How Paris's times are computed
For Paris (48.87° N, 2.33° E) Hourora computes the sun's position for each date and solves for each prayer: Fajr 12°, Isha 12°. Asr uses the standard shadow rule. The times are shown in Central European Summer Time, daylight saving included.
The default is the method usually published in France: UOIF, France (12°). You can choose another method, the Asr rule and the high-latitude rule above; the choice is saved on this device.