# Calendar 2015 = 1987

Interesting thing about saturday in 2015
4/4/2015 saturday
6/6/2015 saturday
8/8/2015 saturday
10/10/2015 saturday
12/12/2015 saturday

$\boxed {\text {For every 28 years, calendar repeats itself.}}$

Calendar of 2015 is same as calendar of 1987

Date & Day even Festivals are same,

Who told history doesn’t repeat ?

So

We are back in 80s

Have a Blessed Happy New Year!

Calendar Math explains:

https://tomcircle.wordpress.com/2013/03/30/calendar-math/

# 黄帝纪年

Note: X = A.D. (Anno Domini 主后)

or

Note:
Y = B.C. (Before Christ 主前)

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

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

2009 AD = Anno (After) Domini (Lord)
800 BC = Before Christ

# 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)