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 SpeedCalendar The card below explains the basics of SpeedCalendar. L2DV table The table below describes L2DV...