黄帝纪年

黄帝纪元年 = X + 2697
Note: X = A.D. (Anno Domini 主后)

or
黄帝纪元年 = 2698 – Y
Note:
Y = B.C. (Before Christ 主前)

黄元年 = 黄(帝纪)元年

黄帝生于黄元1年 = Y = 2697 B.C.
耶稣生于 1 A.D.= 黄元2698 年

夏朝建于 黄元947 年= 1751 B.C.

People Republic of China 1949 A.D. = 黄元 4646年

Republic of Singapore 1965 A.D. = 黄元 4662年

Calendar Math

Mental quick calendar days:
Reference Date: last day in Feb (doomsday) 28/2/2013= Thursday
The following days are all Thursday: 4/4, 6/6, 8/8, 10/10, 12/12
The odd Thursday:
5/9, 9/5 (9 am to 5 pm work)
7/11, 11/7 (Seven-eleven Shop)
7/3 (7+3 = 10)

Quick applications:

  • Singapore National day 9/8/2013 = Fri (8/8 + 1)
  • Xmas 26/12/2013  = Thurs (12/12 +2*7)