ITO Calendar is a Calendar Converter between Persian (Farsi, Hijri Shamsi), Hijri (Ghamari, Hijri Ghamari, Islamic) and Gregorian (Miladi, Julian) Calendars. It design for Pocket PC with Windows Mobile 5.0 OS. Your Best Choice for converting Hijri Shamsi Date ( Shamsi Calendar, Persian Calendar, Farsi Calendar ) To Gregorian Date ( Gregorian Calendar, Miladim Calendar, Julian Calendar ). Your Best Choice for converting Hijri Shamsi Date ( Shamsi Calendar, Persian Calendar, Farsi Calendar ) To Hijri Date ( Hijri Calendar, Hijri Ghamaro, Islamic Calendar ). Your Best Choice for converting Hijri Ghamari Date ( Hijri Calendar, Hijri Ghamaro, Islamic Calendar) To Gregorian Date ( Gregorian Calendar, Miladim Calendar, Julian Calendar ). The ITO.Calendar, also known as the Persian Calendar, takes as its epoch the Hijra, the emigration of Muhammad and his followers in 622 A.D. from Mecca to Medina. It is a lunar calendar with 12 lunar months (see above) and is widely used in many Islamic countries as well as being universally used to determine Islamic holy days. Each lunar (synodic) month consists of the time it takes for the moon to complete one cycle of phases, i.e. the time between one new moon and the next. As a synodic month is approximately 29.531 days, a year in the Hijri calendar has 354.37 days. As this is shorter than the solar (tropical) year, the dates of the Hijri calendar shift with respect to the Gregorian calendar. Gregorian-Hijri Dates Converter. Gregorian-Shamsi Dates Converter. Persian-Hijri Dates Converter.Shamsi-Ghamari Dates Converter. Farsi-Hijri Dates Converter. ITO.Calendars is also estimate pray times, sunset, sunrise, twilight and noon times. you can change longitude and latitude for your specific location to calculate these times for your location. With ITO.Calendars you can calculate : Fajr (Dawn), Shorook (Sunrise), Zuhr (Noon), Asr (Afternoon), Maghrib (Sunset), Isha (Night) for specific date in Hijri, Gregorian or persian calendars.