2. Calendar knowledge 元号変換方法（Gengo – Western Year conversion method）
元号←→西暦の変換は「むなしい人々、ニコニコパパ、いっぱい」で覚えましょう。なお平成12年～30年は12を引くと、20xx年になります。
5.1 Manual
2. Calendar knowledge 
5.1 Manual English calendar calculation manual (simple, 28/56/84 method) is now available
Quick manual and an academic thesis are also available.
5.1 Manual [English/Japanese/Chinese] Available quick manual for calculating day of week (28/56/84 method)
You do not know how to calculate the day of the week? Why don't you master 28/56/84 method? It enables to calculate th...
5.1 Manual Special Tools for SpeedCalender are available now!
Summary for SpeedCalendarThe card below explains the basics of SpeedCalendar.L2DV tableThe table below describes L2DV (L...