Certainly women’s body trys her bio rhythm to harmonize to the moon's rhythm. But actually their rhythms are found much irregular to require the calculations. So Julian Date System can help the calculation. Julian Date enables to calculate the Menstrual Ovalulatory days very easily without considering long month (31 days) or short month (30 days). Scaliger chose the year to be the first year of Julian Period as 4713 BC, before the year no historical record was found. Julian Date (JD) is the continuous count of days since the beginning of the Julian Period starting from noon on Monday, January 1, 4713 BC (Monday, November 24, 4714 BC in Gregory Calendar) with Julian Date 0. The next day of Julian Date 1 was Tuesday, January 2, 4713 BC. “생리배란일계산법 (JD달력에 의한)"은 생리리듬을 간단한 공식으로 만들어 알기 쉽고 계산하기 쉽게 하려는데 목적이 있으며, 계산공식에서 쉽게 계산할 수 있는 회임기와 불임기를 활용하여, 자연회임이나 자연피임을 쉽게 실행할 수 있게 하는 것이, 또 다른 하나의 목적이다. 줄리안데이트(JD)는 BC 4713년 1월 1일 월요일을 원일元日로 하여, 하루씩 더해 가면서 누적하여 계산한 날짜이다. 이렇게 계산하여 2020년 (BC 4713년부터 6733년 되는 해) 1월 1일은 JD 2458 850일이 된다.

1 THEME 2 word
2 FOREWORD
3 MENSTRUAL CYCLE FORMULA
4 CALCULATION WITH JULIAN DATE CALENDAR
5 NATURAL CONCEPTIVE CONTRACEPTIVE METHOD
6 CALCULATION FOR MC 21
7 CALCULATION FOR MC 22
8 CALCULATION FOR MC 23
9 CALCULATION FOR MC 24
10 CALCULATION FOR MC 25
11 CALCULATION FOR MC 26
12 CALCULATION FOR MC 27
13 CALCULATION FOR MC 28
14 CALCULATION FOR MC 29
15 CALCULATION FOR MC 30
16 CALCULATION FOR MC 31
17 CALCULATION FOR MC 32
18 CALCULATION FOR MC 33
19 CALCULATION FOR MC 34
20 CALCULATION FOR MC 35
21 CALCULATION FOR MC 36
22 CALCULATION FOR MC 37
23 JD CALENDAR 2017-2036
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