Fasting Duration
Calculated from Fajr to Maghrib today.
| Date | Fajr | Sunrise | Dhuhr | Asr | Maghrib | Isha |
|---|---|---|---|---|---|---|
| Mon, Aug 3 | 04:04 AM | 06:28 AM | 01:59 PM | 06:02 PM | 09:27 PM | 11:38 PM |
| Tue, Aug 4 | 04:07 AM | 06:29 AM | 01:59 PM | 06:01 PM | 09:26 PM | 11:36 PM |
| Wed, Aug 5 | 04:10 AM | 06:31 AM | 01:59 PM | 06:01 PM | 09:24 PM | 11:33 PM |
| Thu, Aug 6 | 04:12 AM | 06:32 AM | 01:59 PM | 06:00 PM | 09:22 PM | 11:30 PM |
| Fri, Aug 7 | 04:15 AM | 06:33 AM | 01:59 PM | 05:59 PM | 09:21 PM | 11:28 PM |
| Sat, Aug 8 | 04:18 AM | 06:35 AM | 01:58 PM | 05:59 PM | 09:19 PM | 11:25 PM |
| Sun, Aug 9 | 04:20 AM | 06:36 AM | 01:58 PM | 05:58 PM | 09:17 PM | 11:22 PM |
Guyancourt at a Glance
4,510 km
Great-circle distance from Guyancourt to the Kaaba.
118.8° ESE
Face ESE from true north, not magnetic north.
8.3h – 16.2h
Shortest to longest day — a 7.9-hour swing across the year.
Europe/Paris
All times shown are local, adjusted for daylight saving.
31,989
Times are computed for the city centre coordinates.
Why Fajr and Isha need an estimation rule here
At this latitude the sun does not sink a full 18° below the horizon around midsummer, so true night — and with it the astronomical basis for Fajr and Isha — does not occur for several weeks. We apply the Middle of the Night rule during that period, splitting the interval between sunset and sunrise. Your local mosque in Guyancourt may use a different convention; where they differ, follow the mosque.
Nearby Cities
Prayer times in Guyancourt — common questions
What time is Fajr in Guyancourt today?
Fajr in Guyancourt begins at 04:04 AM today. Fajr starts at true dawn, when the sun reaches a set angle below the horizon, and ends at sunrise — so this time shifts by a minute or two each day as the season changes.
Which direction is the Qibla from Guyancourt?
From Guyancourt, the Qibla is 118.8° from true north — roughly ESE. Remember that a phone compass points to magnetic north, so you may need to correct for local magnetic declination.
Which calculation method is used for Guyancourt?
These times use the MWL convention, which is the standard recognised across France. If your mosque follows a different authority, its Fajr and Isha may differ by several minutes — the calculation is identical, only the twilight angle changes.
Are these times accurate for a place the size of Guyancourt?
Yes. Prayer times are computed from Guyancourt's own coordinates, not borrowed from a larger neighbouring city, so the astronomy is exactly as accurate as it is for a capital. The only caveat is that we use a single reference point for the settlement.
Do prayer times in Guyancourt change much between seasons?
Considerably. With a 7.9-hour difference between the longest and shortest day, Fajr and Isha shift substantially across the year in Guyancourt, while Dhuhr — tied to solar noon — barely moves. Checking weekly rather than monthly is worthwhile.