Take the data from the tear-off calendar. Virtually all of them contain information about moon day of the cycle and the phase of a celestial body during this period.
Calculate the lunar day, the special computer program. Because the changes from daylight occur at the level of the calculation days, the program will need to specify not only the date but also the time and also the geographical coordinates. This is especially important if you are building a lunar horoscope by time of birth. The system will give you data not only about the moon day, but the closest to the date of the new moon and the full moon, and the rising and setting of the moon in a particular period.
Find out day of the moon alone. The lunar cycle begins with the new moon, which you can fix yourself, and lasts for about 29 days. Thus, the fifth day after the new moon and will be the fifth day of the lunar cycle. But this calculation does not take into account that one day in the Gregorian calendar can fall on a two moon day. You can fix this, if you count the new day with the rising of the moon.
Get information on moon day according to different calendars. The Islamic year according to the lunar calendar consists of 354 days, so it dates constantly shifted with respect to the solar calendar. It is best in this case to use the comparative tables of calendars. For example, one shows that the first number of the first month of Muharram in 2012 will occur November 15 on the solar calendar. Note that the start date is in the lunar calendars. For example, in 2012 the Chinese year begins on 23 January in the Gregorian calendar.
Received information about moon day use for the horoscope. His accuracy will be higher, if you except the dates indicated and the time and place of the observation of the moon or any event.