Time A.13 Number of days in each month

30 days hath September,
April, June and November,
All the rest have 31,
Excepting February alone
(And that has 28 days clear,
  With 29 in each leap year).

The number of days in each month can also be found by counting across the knuckles and valleys on the back of each clenched fist (from left to right):


Each "knuckle" month has 31 days, while each "valley" month has only 30 days (excepting of course February).


January-31 days
February-28/29 days 
March-31 days
April-30 days
May-31 days
June-30 days
July-31 days
August-31 days
September-30 days
October-31 days
November-30 days
December-31 days