BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Stellarhound//city-ics-v1//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Stellarhound — Organ Pipe Cactus National Monument dark-sky 
 nights
X-WR-CALDESC:Nights when the Moon leaves Organ Pipe Cactus National Monumen
 t's dark hours essentially moon-free (moon interference ≤ 15%\, the deep
 -sky standard used across stellarhound.com). Deterministic moon & darkness
  geometry via Skyfield + JPL DE440s (city-ics-v1). Cloud cover is not know
 able this far ahead — check the live forecast at https://stellarhound.co
 m/dark-sites/organ-pipe-cactus-national-monument?utm_source=calendar&utm_m
 edium=ics&utm_campaign=dark-site-windows&utm_content=organ-pipe-cactus-nat
 ional-monument closer to each window.
REFRESH-INTERVAL;VALUE=DURATION:P1W
X-PUBLISHED-TTL:P1W
BEGIN:VEVENT
UID:dark-site-window-organ-pipe-cactus-national-monument-2026-08-07@stellar
 hound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20260807
DTEND;VALUE=DATE:20260819
SUMMARY:Dark-sky window · 12 moon-free nights
DESCRIPTION:12 nights with essentially moon-free dark hours at Organ Pipe C
 actus National Monument (nightly moon interference ≤ 15% — Moon below 
 the horizon for nearly all of astronomical darkness\, or too thin to matte
 r).\n\nCloud is the one thing no calendar can promise. When a window gets 
 close\, check the live per-night forecast: https://stellarhound.com/dark-s
 ites/organ-pipe-cactus-national-monument?utm_source=calendar&utm_medium=ic
 s&utm_campaign=dark-site-windows&utm_content=organ-pipe-cactus-national-mo
 nument\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyf
 ield + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/dark-sites/organ-pipe-cactus-national-monument
 ?utm_source=calendar&utm_medium=ics&utm_campaign=dark-site-windows&utm_con
 tent=organ-pipe-cactus-national-monument
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-site-window-organ-pipe-cactus-national-monument-2026-09-05@stellar
 hound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20260905
DTEND;VALUE=DATE:20260918
SUMMARY:Dark-sky window · 13 moon-free nights
DESCRIPTION:13 nights with essentially moon-free dark hours at Organ Pipe C
 actus National Monument (nightly moon interference ≤ 15% — Moon below 
 the horizon for nearly all of astronomical darkness\, or too thin to matte
 r).\n\nCloud is the one thing no calendar can promise. When a window gets 
 close\, check the live per-night forecast: https://stellarhound.com/dark-s
 ites/organ-pipe-cactus-national-monument?utm_source=calendar&utm_medium=ic
 s&utm_campaign=dark-site-windows&utm_content=organ-pipe-cactus-national-mo
 nument\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyf
 ield + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/dark-sites/organ-pipe-cactus-national-monument
 ?utm_source=calendar&utm_medium=ics&utm_campaign=dark-site-windows&utm_con
 tent=organ-pipe-cactus-national-monument
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-site-window-organ-pipe-cactus-national-monument-2026-10-04@stellar
 hound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20261004
DTEND;VALUE=DATE:20261017
SUMMARY:Dark-sky window · 13 moon-free nights
DESCRIPTION:13 nights with essentially moon-free dark hours at Organ Pipe C
 actus National Monument (nightly moon interference ≤ 15% — Moon below 
 the horizon for nearly all of astronomical darkness\, or too thin to matte
 r).\n\nCloud is the one thing no calendar can promise. When a window gets 
 close\, check the live per-night forecast: https://stellarhound.com/dark-s
 ites/organ-pipe-cactus-national-monument?utm_source=calendar&utm_medium=ic
 s&utm_campaign=dark-site-windows&utm_content=organ-pipe-cactus-national-mo
 nument\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyf
 ield + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/dark-sites/organ-pipe-cactus-national-monument
 ?utm_source=calendar&utm_medium=ics&utm_campaign=dark-site-windows&utm_con
 tent=organ-pipe-cactus-national-monument
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-site-window-organ-pipe-cactus-national-monument-2026-11-02@stellar
 hound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20261102
DTEND;VALUE=DATE:20261116
SUMMARY:Dark-sky window · 14 moon-free nights
DESCRIPTION:14 nights with essentially moon-free dark hours at Organ Pipe C
 actus National Monument (nightly moon interference ≤ 15% — Moon below 
 the horizon for nearly all of astronomical darkness\, or too thin to matte
 r).\n\nCloud is the one thing no calendar can promise. When a window gets 
 close\, check the live per-night forecast: https://stellarhound.com/dark-s
 ites/organ-pipe-cactus-national-monument?utm_source=calendar&utm_medium=ic
 s&utm_campaign=dark-site-windows&utm_content=organ-pipe-cactus-national-mo
 nument\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyf
 ield + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/dark-sites/organ-pipe-cactus-national-monument
 ?utm_source=calendar&utm_medium=ics&utm_campaign=dark-site-windows&utm_con
 tent=organ-pipe-cactus-national-monument
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-site-window-organ-pipe-cactus-national-monument-2026-12-02@stellar
 hound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20261202
DTEND;VALUE=DATE:20261215
SUMMARY:Dark-sky window · 13 moon-free nights
DESCRIPTION:13 nights with essentially moon-free dark hours at Organ Pipe C
 actus National Monument (nightly moon interference ≤ 15% — Moon below 
 the horizon for nearly all of astronomical darkness\, or too thin to matte
 r).\n\nCloud is the one thing no calendar can promise. When a window gets 
 close\, check the live per-night forecast: https://stellarhound.com/dark-s
 ites/organ-pipe-cactus-national-monument?utm_source=calendar&utm_medium=ic
 s&utm_campaign=dark-site-windows&utm_content=organ-pipe-cactus-national-mo
 nument\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyf
 ield + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/dark-sites/organ-pipe-cactus-national-monument
 ?utm_source=calendar&utm_medium=ics&utm_campaign=dark-site-windows&utm_con
 tent=organ-pipe-cactus-national-monument
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-site-window-organ-pipe-cactus-national-monument-2026-12-31@stellar
 hound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20261231
DTEND;VALUE=DATE:20270114
SUMMARY:Dark-sky window · 14 moon-free nights
DESCRIPTION:14 nights with essentially moon-free dark hours at Organ Pipe C
 actus National Monument (nightly moon interference ≤ 15% — Moon below 
 the horizon for nearly all of astronomical darkness\, or too thin to matte
 r).\n\nCloud is the one thing no calendar can promise. When a window gets 
 close\, check the live per-night forecast: https://stellarhound.com/dark-s
 ites/organ-pipe-cactus-national-monument?utm_source=calendar&utm_medium=ic
 s&utm_campaign=dark-site-windows&utm_content=organ-pipe-cactus-national-mo
 nument\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyf
 ield + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/dark-sites/organ-pipe-cactus-national-monument
 ?utm_source=calendar&utm_medium=ics&utm_campaign=dark-site-windows&utm_con
 tent=organ-pipe-cactus-national-monument
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-site-window-organ-pipe-cactus-national-monument-2027-01-30@stellar
 hound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20270130
DTEND;VALUE=DATE:20270212
SUMMARY:Dark-sky window · 13 moon-free nights
DESCRIPTION:13 nights with essentially moon-free dark hours at Organ Pipe C
 actus National Monument (nightly moon interference ≤ 15% — Moon below 
 the horizon for nearly all of astronomical darkness\, or too thin to matte
 r).\n\nCloud is the one thing no calendar can promise. When a window gets 
 close\, check the live per-night forecast: https://stellarhound.com/dark-s
 ites/organ-pipe-cactus-national-monument?utm_source=calendar&utm_medium=ic
 s&utm_campaign=dark-site-windows&utm_content=organ-pipe-cactus-national-mo
 nument\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyf
 ield + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/dark-sites/organ-pipe-cactus-national-monument
 ?utm_source=calendar&utm_medium=ics&utm_campaign=dark-site-windows&utm_con
 tent=organ-pipe-cactus-national-monument
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-site-window-organ-pipe-cactus-national-monument-2027-02-28@stellar
 hound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20270228
DTEND;VALUE=DATE:20270313
SUMMARY:Dark-sky window · 13 moon-free nights
DESCRIPTION:13 nights with essentially moon-free dark hours at Organ Pipe C
 actus National Monument (nightly moon interference ≤ 15% — Moon below 
 the horizon for nearly all of astronomical darkness\, or too thin to matte
 r).\n\nCloud is the one thing no calendar can promise. When a window gets 
 close\, check the live per-night forecast: https://stellarhound.com/dark-s
 ites/organ-pipe-cactus-national-monument?utm_source=calendar&utm_medium=ic
 s&utm_campaign=dark-site-windows&utm_content=organ-pipe-cactus-national-mo
 nument\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyf
 ield + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/dark-sites/organ-pipe-cactus-national-monument
 ?utm_source=calendar&utm_medium=ics&utm_campaign=dark-site-windows&utm_con
 tent=organ-pipe-cactus-national-monument
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-site-window-organ-pipe-cactus-national-monument-2027-03-30@stellar
 hound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20270330
DTEND;VALUE=DATE:20270411
SUMMARY:Dark-sky window · 12 moon-free nights
DESCRIPTION:12 nights with essentially moon-free dark hours at Organ Pipe C
 actus National Monument (nightly moon interference ≤ 15% — Moon below 
 the horizon for nearly all of astronomical darkness\, or too thin to matte
 r).\n\nCloud is the one thing no calendar can promise. When a window gets 
 close\, check the live per-night forecast: https://stellarhound.com/dark-s
 ites/organ-pipe-cactus-national-monument?utm_source=calendar&utm_medium=ic
 s&utm_campaign=dark-site-windows&utm_content=organ-pipe-cactus-national-mo
 nument\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyf
 ield + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/dark-sites/organ-pipe-cactus-national-monument
 ?utm_source=calendar&utm_medium=ics&utm_campaign=dark-site-windows&utm_con
 tent=organ-pipe-cactus-national-monument
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-site-window-organ-pipe-cactus-national-monument-2027-04-28@stellar
 hound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20270428
DTEND;VALUE=DATE:20270511
SUMMARY:Dark-sky window · 13 moon-free nights
DESCRIPTION:13 nights with essentially moon-free dark hours at Organ Pipe C
 actus National Monument (nightly moon interference ≤ 15% — Moon below 
 the horizon for nearly all of astronomical darkness\, or too thin to matte
 r).\n\nCloud is the one thing no calendar can promise. When a window gets 
 close\, check the live per-night forecast: https://stellarhound.com/dark-s
 ites/organ-pipe-cactus-national-monument?utm_source=calendar&utm_medium=ic
 s&utm_campaign=dark-site-windows&utm_content=organ-pipe-cactus-national-mo
 nument\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyf
 ield + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/dark-sites/organ-pipe-cactus-national-monument
 ?utm_source=calendar&utm_medium=ics&utm_campaign=dark-site-windows&utm_con
 tent=organ-pipe-cactus-national-monument
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-site-window-organ-pipe-cactus-national-monument-2027-05-29@stellar
 hound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20270529
DTEND;VALUE=DATE:20270609
SUMMARY:Dark-sky window · 11 moon-free nights
DESCRIPTION:11 nights with essentially moon-free dark hours at Organ Pipe C
 actus National Monument (nightly moon interference ≤ 15% — Moon below 
 the horizon for nearly all of astronomical darkness\, or too thin to matte
 r).\n\nCloud is the one thing no calendar can promise. When a window gets 
 close\, check the live per-night forecast: https://stellarhound.com/dark-s
 ites/organ-pipe-cactus-national-monument?utm_source=calendar&utm_medium=ic
 s&utm_campaign=dark-site-windows&utm_content=organ-pipe-cactus-national-mo
 nument\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyf
 ield + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/dark-sites/organ-pipe-cactus-national-monument
 ?utm_source=calendar&utm_medium=ics&utm_campaign=dark-site-windows&utm_con
 tent=organ-pipe-cactus-national-monument
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-site-window-organ-pipe-cactus-national-monument-2027-06-28@stellar
 hound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20270628
DTEND;VALUE=DATE:20270709
SUMMARY:Dark-sky window · 11 moon-free nights
DESCRIPTION:11 nights with essentially moon-free dark hours at Organ Pipe C
 actus National Monument (nightly moon interference ≤ 15% — Moon below 
 the horizon for nearly all of astronomical darkness\, or too thin to matte
 r).\n\nCloud is the one thing no calendar can promise. When a window gets 
 close\, check the live per-night forecast: https://stellarhound.com/dark-s
 ites/organ-pipe-cactus-national-monument?utm_source=calendar&utm_medium=ic
 s&utm_campaign=dark-site-windows&utm_content=organ-pipe-cactus-national-mo
 nument\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyf
 ield + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/dark-sites/organ-pipe-cactus-national-monument
 ?utm_source=calendar&utm_medium=ics&utm_campaign=dark-site-windows&utm_con
 tent=organ-pipe-cactus-national-monument
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-site-window-organ-pipe-cactus-national-monument-2027-07-28@stellar
 hound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20270728
DTEND;VALUE=DATE:20270808
SUMMARY:Dark-sky window · 11 moon-free nights
DESCRIPTION:11 nights with essentially moon-free dark hours at Organ Pipe C
 actus National Monument (nightly moon interference ≤ 15% — Moon below 
 the horizon for nearly all of astronomical darkness\, or too thin to matte
 r).\n\nCloud is the one thing no calendar can promise. When a window gets 
 close\, check the live per-night forecast: https://stellarhound.com/dark-s
 ites/organ-pipe-cactus-national-monument?utm_source=calendar&utm_medium=ic
 s&utm_campaign=dark-site-windows&utm_content=organ-pipe-cactus-national-mo
 nument\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyf
 ield + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/dark-sites/organ-pipe-cactus-national-monument
 ?utm_source=calendar&utm_medium=ics&utm_campaign=dark-site-windows&utm_con
 tent=organ-pipe-cactus-national-monument
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-site-window-organ-pipe-cactus-national-monument-2027-08-26@stellar
 hound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20270826
DTEND;VALUE=DATE:20270907
SUMMARY:Dark-sky window · 12 moon-free nights
DESCRIPTION:12 nights with essentially moon-free dark hours at Organ Pipe C
 actus National Monument (nightly moon interference ≤ 15% — Moon below 
 the horizon for nearly all of astronomical darkness\, or too thin to matte
 r).\n\nCloud is the one thing no calendar can promise. When a window gets 
 close\, check the live per-night forecast: https://stellarhound.com/dark-s
 ites/organ-pipe-cactus-national-monument?utm_source=calendar&utm_medium=ic
 s&utm_campaign=dark-site-windows&utm_content=organ-pipe-cactus-national-mo
 nument\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyf
 ield + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/dark-sites/organ-pipe-cactus-national-monument
 ?utm_source=calendar&utm_medium=ics&utm_campaign=dark-site-windows&utm_con
 tent=organ-pipe-cactus-national-monument
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-site-window-organ-pipe-cactus-national-monument-2027-09-24@stellar
 hound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20270924
DTEND;VALUE=DATE:20271006
SUMMARY:Dark-sky window · 12 moon-free nights
DESCRIPTION:12 nights with essentially moon-free dark hours at Organ Pipe C
 actus National Monument (nightly moon interference ≤ 15% — Moon below 
 the horizon for nearly all of astronomical darkness\, or too thin to matte
 r).\n\nCloud is the one thing no calendar can promise. When a window gets 
 close\, check the live per-night forecast: https://stellarhound.com/dark-s
 ites/organ-pipe-cactus-national-monument?utm_source=calendar&utm_medium=ic
 s&utm_campaign=dark-site-windows&utm_content=organ-pipe-cactus-national-mo
 nument\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyf
 ield + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/dark-sites/organ-pipe-cactus-national-monument
 ?utm_source=calendar&utm_medium=ics&utm_campaign=dark-site-windows&utm_con
 tent=organ-pipe-cactus-national-monument
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-site-window-organ-pipe-cactus-national-monument-2027-10-23@stellar
 hound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20271023
DTEND;VALUE=DATE:20271105
SUMMARY:Dark-sky window · 13 moon-free nights
DESCRIPTION:13 nights with essentially moon-free dark hours at Organ Pipe C
 actus National Monument (nightly moon interference ≤ 15% — Moon below 
 the horizon for nearly all of astronomical darkness\, or too thin to matte
 r).\n\nCloud is the one thing no calendar can promise. When a window gets 
 close\, check the live per-night forecast: https://stellarhound.com/dark-s
 ites/organ-pipe-cactus-national-monument?utm_source=calendar&utm_medium=ic
 s&utm_campaign=dark-site-windows&utm_content=organ-pipe-cactus-national-mo
 nument\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyf
 ield + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/dark-sites/organ-pipe-cactus-national-monument
 ?utm_source=calendar&utm_medium=ics&utm_campaign=dark-site-windows&utm_con
 tent=organ-pipe-cactus-national-monument
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-site-window-organ-pipe-cactus-national-monument-2027-11-21@stellar
 hound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20271121
DTEND;VALUE=DATE:20271204
SUMMARY:Dark-sky window · 13 moon-free nights
DESCRIPTION:13 nights with essentially moon-free dark hours at Organ Pipe C
 actus National Monument (nightly moon interference ≤ 15% — Moon below 
 the horizon for nearly all of astronomical darkness\, or too thin to matte
 r).\n\nCloud is the one thing no calendar can promise. When a window gets 
 close\, check the live per-night forecast: https://stellarhound.com/dark-s
 ites/organ-pipe-cactus-national-monument?utm_source=calendar&utm_medium=ic
 s&utm_campaign=dark-site-windows&utm_content=organ-pipe-cactus-national-mo
 nument\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyf
 ield + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/dark-sites/organ-pipe-cactus-national-monument
 ?utm_source=calendar&utm_medium=ics&utm_campaign=dark-site-windows&utm_con
 tent=organ-pipe-cactus-national-monument
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-site-window-organ-pipe-cactus-national-monument-2027-12-21@stellar
 hound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20271221
DTEND;VALUE=DATE:20280101
SUMMARY:Dark-sky window · 11 moon-free nights
DESCRIPTION:11 nights with essentially moon-free dark hours at Organ Pipe C
 actus National Monument (nightly moon interference ≤ 15% — Moon below 
 the horizon for nearly all of astronomical darkness\, or too thin to matte
 r).\n\nCloud is the one thing no calendar can promise. When a window gets 
 close\, check the live per-night forecast: https://stellarhound.com/dark-s
 ites/organ-pipe-cactus-national-monument?utm_source=calendar&utm_medium=ic
 s&utm_campaign=dark-site-windows&utm_content=organ-pipe-cactus-national-mo
 nument\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyf
 ield + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/dark-sites/organ-pipe-cactus-national-monument
 ?utm_source=calendar&utm_medium=ics&utm_campaign=dark-site-windows&utm_con
 tent=organ-pipe-cactus-national-monument
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
END:VCALENDAR