BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Stellarhound//city-ics-v1//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Stellarhound — Philadelphia dark-sky nights
X-WR-CALDESC:Nights when the Moon leaves Philadelphia's dark hours essentia
 lly moon-free (moon interference ≤ 15%\, the deep-sky standard used acro
 ss stellarhound.com). Deterministic moon & darkness geometry via Skyfield 
 + JPL DE440s (city-ics-v1). Cloud cover is not knowable this far ahead —
  check the live forecast at https://stellarhound.com/stargazing/us/philade
 lphia?utm_source=calendar&utm_medium=ics&utm_campaign=dark-windows&utm_con
 tent=philadelphia closer to each window.
REFRESH-INTERVAL;VALUE=DURATION:P1W
X-PUBLISHED-TTL:P1W
BEGIN:VEVENT
UID:dark-window-philadelphia-2026-08-07@stellarhound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20260807
DTEND;VALUE=DATE:20260820
SUMMARY:Dark-sky window · 13 moon-free nights
DESCRIPTION:13 nights with essentially moon-free dark hours in Philadelphia
  (nightly moon interference ≤ 15% — Moon below the horizon for nearly 
 all of astronomical darkness\, or too thin to matter).\n\nCloud is the one
  thing no calendar can promise. When a window gets close\, check the live 
 per-night forecast: https://stellarhound.com/stargazing/us/philadelphia?ut
 m_source=calendar&utm_medium=ics&utm_campaign=dark-windows&utm_content=phi
 ladelphia\nDark-site recommendations near Philadelphia are on the same pag
 e.\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyfield
  + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/stargazing/us/philadelphia?utm_source=calendar
 &utm_medium=ics&utm_campaign=dark-windows&utm_content=philadelphia
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-window-philadelphia-2026-09-05@stellarhound.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 in Philadelphia
  (nightly moon interference ≤ 15% — Moon below the horizon for nearly 
 all of astronomical darkness\, or too thin to matter).\n\nCloud is the one
  thing no calendar can promise. When a window gets close\, check the live 
 per-night forecast: https://stellarhound.com/stargazing/us/philadelphia?ut
 m_source=calendar&utm_medium=ics&utm_campaign=dark-windows&utm_content=phi
 ladelphia\nDark-site recommendations near Philadelphia are on the same pag
 e.\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyfield
  + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/stargazing/us/philadelphia?utm_source=calendar
 &utm_medium=ics&utm_campaign=dark-windows&utm_content=philadelphia
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-window-philadelphia-2026-10-04@stellarhound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20261004
DTEND;VALUE=DATE:20261018
SUMMARY:Dark-sky window · 14 moon-free nights
DESCRIPTION:14 nights with essentially moon-free dark hours in Philadelphia
  (nightly moon interference ≤ 15% — Moon below the horizon for nearly 
 all of astronomical darkness\, or too thin to matter).\n\nCloud is the one
  thing no calendar can promise. When a window gets close\, check the live 
 per-night forecast: https://stellarhound.com/stargazing/us/philadelphia?ut
 m_source=calendar&utm_medium=ics&utm_campaign=dark-windows&utm_content=phi
 ladelphia\nDark-site recommendations near Philadelphia are on the same pag
 e.\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyfield
  + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/stargazing/us/philadelphia?utm_source=calendar
 &utm_medium=ics&utm_campaign=dark-windows&utm_content=philadelphia
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-window-philadelphia-2026-11-03@stellarhound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20261103
DTEND;VALUE=DATE:20261116
SUMMARY:Dark-sky window · 13 moon-free nights
DESCRIPTION:13 nights with essentially moon-free dark hours in Philadelphia
  (nightly moon interference ≤ 15% — Moon below the horizon for nearly 
 all of astronomical darkness\, or too thin to matter).\n\nCloud is the one
  thing no calendar can promise. When a window gets close\, check the live 
 per-night forecast: https://stellarhound.com/stargazing/us/philadelphia?ut
 m_source=calendar&utm_medium=ics&utm_campaign=dark-windows&utm_content=phi
 ladelphia\nDark-site recommendations near Philadelphia are on the same pag
 e.\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyfield
  + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/stargazing/us/philadelphia?utm_source=calendar
 &utm_medium=ics&utm_campaign=dark-windows&utm_content=philadelphia
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-window-philadelphia-2026-12-02@stellarhound.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 in Philadelphia
  (nightly moon interference ≤ 15% — Moon below the horizon for nearly 
 all of astronomical darkness\, or too thin to matter).\n\nCloud is the one
  thing no calendar can promise. When a window gets close\, check the live 
 per-night forecast: https://stellarhound.com/stargazing/us/philadelphia?ut
 m_source=calendar&utm_medium=ics&utm_campaign=dark-windows&utm_content=phi
 ladelphia\nDark-site recommendations near Philadelphia are on the same pag
 e.\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyfield
  + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/stargazing/us/philadelphia?utm_source=calendar
 &utm_medium=ics&utm_campaign=dark-windows&utm_content=philadelphia
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-window-philadelphia-2026-12-31@stellarhound.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 in Philadelphia
  (nightly moon interference ≤ 15% — Moon below the horizon for nearly 
 all of astronomical darkness\, or too thin to matter).\n\nCloud is the one
  thing no calendar can promise. When a window gets close\, check the live 
 per-night forecast: https://stellarhound.com/stargazing/us/philadelphia?ut
 m_source=calendar&utm_medium=ics&utm_campaign=dark-windows&utm_content=phi
 ladelphia\nDark-site recommendations near Philadelphia are on the same pag
 e.\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyfield
  + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/stargazing/us/philadelphia?utm_source=calendar
 &utm_medium=ics&utm_campaign=dark-windows&utm_content=philadelphia
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-window-philadelphia-2027-01-30@stellarhound.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 in Philadelphia
  (nightly moon interference ≤ 15% — Moon below the horizon for nearly 
 all of astronomical darkness\, or too thin to matter).\n\nCloud is the one
  thing no calendar can promise. When a window gets close\, check the live 
 per-night forecast: https://stellarhound.com/stargazing/us/philadelphia?ut
 m_source=calendar&utm_medium=ics&utm_campaign=dark-windows&utm_content=phi
 ladelphia\nDark-site recommendations near Philadelphia are on the same pag
 e.\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyfield
  + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/stargazing/us/philadelphia?utm_source=calendar
 &utm_medium=ics&utm_campaign=dark-windows&utm_content=philadelphia
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-window-philadelphia-2027-02-28@stellarhound.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 in Philadelphia
  (nightly moon interference ≤ 15% — Moon below the horizon for nearly 
 all of astronomical darkness\, or too thin to matter).\n\nCloud is the one
  thing no calendar can promise. When a window gets close\, check the live 
 per-night forecast: https://stellarhound.com/stargazing/us/philadelphia?ut
 m_source=calendar&utm_medium=ics&utm_campaign=dark-windows&utm_content=phi
 ladelphia\nDark-site recommendations near Philadelphia are on the same pag
 e.\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyfield
  + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/stargazing/us/philadelphia?utm_source=calendar
 &utm_medium=ics&utm_campaign=dark-windows&utm_content=philadelphia
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-window-philadelphia-2027-03-29@stellarhound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20270329
DTEND;VALUE=DATE:20270411
SUMMARY:Dark-sky window · 13 moon-free nights
DESCRIPTION:13 nights with essentially moon-free dark hours in Philadelphia
  (nightly moon interference ≤ 15% — Moon below the horizon for nearly 
 all of astronomical darkness\, or too thin to matter).\n\nCloud is the one
  thing no calendar can promise. When a window gets close\, check the live 
 per-night forecast: https://stellarhound.com/stargazing/us/philadelphia?ut
 m_source=calendar&utm_medium=ics&utm_campaign=dark-windows&utm_content=phi
 ladelphia\nDark-site recommendations near Philadelphia are on the same pag
 e.\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyfield
  + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/stargazing/us/philadelphia?utm_source=calendar
 &utm_medium=ics&utm_campaign=dark-windows&utm_content=philadelphia
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-window-philadelphia-2027-04-28@stellarhound.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 in Philadelphia
  (nightly moon interference ≤ 15% — Moon below the horizon for nearly 
 all of astronomical darkness\, or too thin to matter).\n\nCloud is the one
  thing no calendar can promise. When a window gets close\, check the live 
 per-night forecast: https://stellarhound.com/stargazing/us/philadelphia?ut
 m_source=calendar&utm_medium=ics&utm_campaign=dark-windows&utm_content=phi
 ladelphia\nDark-site recommendations near Philadelphia are on the same pag
 e.\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyfield
  + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/stargazing/us/philadelphia?utm_source=calendar
 &utm_medium=ics&utm_campaign=dark-windows&utm_content=philadelphia
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-window-philadelphia-2027-05-29@stellarhound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20270529
DTEND;VALUE=DATE:20270610
SUMMARY:Dark-sky window · 12 moon-free nights
DESCRIPTION:12 nights with essentially moon-free dark hours in Philadelphia
  (nightly moon interference ≤ 15% — Moon below the horizon for nearly 
 all of astronomical darkness\, or too thin to matter).\n\nCloud is the one
  thing no calendar can promise. When a window gets close\, check the live 
 per-night forecast: https://stellarhound.com/stargazing/us/philadelphia?ut
 m_source=calendar&utm_medium=ics&utm_campaign=dark-windows&utm_content=phi
 ladelphia\nDark-site recommendations near Philadelphia are on the same pag
 e.\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyfield
  + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/stargazing/us/philadelphia?utm_source=calendar
 &utm_medium=ics&utm_campaign=dark-windows&utm_content=philadelphia
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-window-philadelphia-2027-06-28@stellarhound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20270628
DTEND;VALUE=DATE:20270710
SUMMARY:Dark-sky window · 12 moon-free nights
DESCRIPTION:12 nights with essentially moon-free dark hours in Philadelphia
  (nightly moon interference ≤ 15% — Moon below the horizon for nearly 
 all of astronomical darkness\, or too thin to matter).\n\nCloud is the one
  thing no calendar can promise. When a window gets close\, check the live 
 per-night forecast: https://stellarhound.com/stargazing/us/philadelphia?ut
 m_source=calendar&utm_medium=ics&utm_campaign=dark-windows&utm_content=phi
 ladelphia\nDark-site recommendations near Philadelphia are on the same pag
 e.\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyfield
  + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/stargazing/us/philadelphia?utm_source=calendar
 &utm_medium=ics&utm_campaign=dark-windows&utm_content=philadelphia
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-window-philadelphia-2027-07-28@stellarhound.com
DTSTAMP:20260719T000000Z
DTSTART;VALUE=DATE:20270728
DTEND;VALUE=DATE:20270809
SUMMARY:Dark-sky window · 12 moon-free nights
DESCRIPTION:12 nights with essentially moon-free dark hours in Philadelphia
  (nightly moon interference ≤ 15% — Moon below the horizon for nearly 
 all of astronomical darkness\, or too thin to matter).\n\nCloud is the one
  thing no calendar can promise. When a window gets close\, check the live 
 per-night forecast: https://stellarhound.com/stargazing/us/philadelphia?ut
 m_source=calendar&utm_medium=ics&utm_campaign=dark-windows&utm_content=phi
 ladelphia\nDark-site recommendations near Philadelphia are on the same pag
 e.\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyfield
  + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/stargazing/us/philadelphia?utm_source=calendar
 &utm_medium=ics&utm_campaign=dark-windows&utm_content=philadelphia
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-window-philadelphia-2027-08-26@stellarhound.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 in Philadelphia
  (nightly moon interference ≤ 15% — Moon below the horizon for nearly 
 all of astronomical darkness\, or too thin to matter).\n\nCloud is the one
  thing no calendar can promise. When a window gets close\, check the live 
 per-night forecast: https://stellarhound.com/stargazing/us/philadelphia?ut
 m_source=calendar&utm_medium=ics&utm_campaign=dark-windows&utm_content=phi
 ladelphia\nDark-site recommendations near Philadelphia are on the same pag
 e.\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyfield
  + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/stargazing/us/philadelphia?utm_source=calendar
 &utm_medium=ics&utm_campaign=dark-windows&utm_content=philadelphia
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-window-philadelphia-2027-09-24@stellarhound.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 in Philadelphia
  (nightly moon interference ≤ 15% — Moon below the horizon for nearly 
 all of astronomical darkness\, or too thin to matter).\n\nCloud is the one
  thing no calendar can promise. When a window gets close\, check the live 
 per-night forecast: https://stellarhound.com/stargazing/us/philadelphia?ut
 m_source=calendar&utm_medium=ics&utm_campaign=dark-windows&utm_content=phi
 ladelphia\nDark-site recommendations near Philadelphia are on the same pag
 e.\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyfield
  + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/stargazing/us/philadelphia?utm_source=calendar
 &utm_medium=ics&utm_campaign=dark-windows&utm_content=philadelphia
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-window-philadelphia-2027-10-23@stellarhound.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 in Philadelphia
  (nightly moon interference ≤ 15% — Moon below the horizon for nearly 
 all of astronomical darkness\, or too thin to matter).\n\nCloud is the one
  thing no calendar can promise. When a window gets close\, check the live 
 per-night forecast: https://stellarhound.com/stargazing/us/philadelphia?ut
 m_source=calendar&utm_medium=ics&utm_campaign=dark-windows&utm_content=phi
 ladelphia\nDark-site recommendations near Philadelphia are on the same pag
 e.\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyfield
  + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/stargazing/us/philadelphia?utm_source=calendar
 &utm_medium=ics&utm_campaign=dark-windows&utm_content=philadelphia
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-window-philadelphia-2027-11-21@stellarhound.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 in Philadelphia
  (nightly moon interference ≤ 15% — Moon below the horizon for nearly 
 all of astronomical darkness\, or too thin to matter).\n\nCloud is the one
  thing no calendar can promise. When a window gets close\, check the live 
 per-night forecast: https://stellarhound.com/stargazing/us/philadelphia?ut
 m_source=calendar&utm_medium=ics&utm_campaign=dark-windows&utm_content=phi
 ladelphia\nDark-site recommendations near Philadelphia are on the same pag
 e.\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyfield
  + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/stargazing/us/philadelphia?utm_source=calendar
 &utm_medium=ics&utm_campaign=dark-windows&utm_content=philadelphia
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:dark-window-philadelphia-2027-12-21@stellarhound.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 in Philadelphia
  (nightly moon interference ≤ 15% — Moon below the horizon for nearly 
 all of astronomical darkness\, or too thin to matter).\n\nCloud is the one
  thing no calendar can promise. When a window gets close\, check the live 
 per-night forecast: https://stellarhound.com/stargazing/us/philadelphia?ut
 m_source=calendar&utm_medium=ics&utm_campaign=dark-windows&utm_content=phi
 ladelphia\nDark-site recommendations near Philadelphia are on the same pag
 e.\n\nRule city-ics-v1 — deterministic moon/darkness geometry\, Skyfield
  + JPL DE440s. Not a weather forecast.
URL:https://stellarhound.com/stargazing/us/philadelphia?utm_source=calendar
 &utm_medium=ics&utm_campaign=dark-windows&utm_content=philadelphia
CATEGORIES:dark-sky-window
STATUS:CONFIRMED
TRANSP:TRANSPARENT
END:VEVENT
END:VCALENDAR