The Fourth Day app for iPhone and iPad

The Fourth Day is an astronomical clock and almanac for your iPhone or iPod Touch. Customized for your location, The Fourth Day displays information about the daily, monthly, and yearly astronomical events related to time keeping.

The Fourth Day goes beyond sunrise and set, and moon phases. It also displays:

✔ Start and ending times of civil, nautical, and astronomical twilights
✔ Lunar and solar transits
✔ Lunar and solar perigee and apogee dates and distances,
✔ Dates and times of equinoxes and solstices,
✔ Longest and shortest day of the year for your geographic location.
✔ Distance values which can be displayed in miles or kilometers.

ⓘ No Internet Connection Required!
All calculations are done on the device

ⓘ Customize location using your device’s location services, or enter your own latitude and longitude!