G Prayer can help with prayer times and Hijri date in your area. Try asking it about a specific prayer:
'When is time for sunset prayer?' Or, just the next prayer:
'When is athan?' You can also ask about the date in Hijri!
'What is the date?' You also can update or delete your stored location with:
'Update my location' and 'Delete my location'. You can refer to prayers by their Arabic names, such as Maghrib and Isha, but if you can't get you assistant to recognize it, just use the English names :)
Say dawn for Fajr, noon for Dhuhr, afternoon for Asr, sunset for Maghrib, night for Isha, and you can also ask about midnight, and sunrise. Currently, it uses the ISNA calendar for people in North America, but can still be used anywhere, but make sure this is the calculation method you want.