How Melbourne's times are computed
For Melbourne (37.82° S, 144.97° E) Hourora computes the sun's position for each date and solves for each prayer: Fajr 18°, Isha 17°. Asr uses the standard shadow rule. The times are shown in Australian Eastern Daylight Time, daylight saving included.
The default is the method usually published in Australia: Muslim World League. You can choose another method, the Asr rule and the high-latitude rule above; the choice is saved on this device.