THIRTEEN. PERIOD CALENDAR FOR 1935 
For a number of years the practice of dividing the year into 13 periods of 4 weeks each has 
been gaining favor in business. Divided this way, any period is directly comparable to any other 
period 
The varying number of calendar days, working days, Saturdays, etc., in different months of the 
ordinary 12 month calendar often distorts seriously such vital statistics of business 
as sales, costs. 
production, payrolls, etc. For National Diary users who record such facts on a weekly or four 
weekly basis, the 1935 Official 13 period calendar is presented by courtesy of the International 
Fixed Calendar League, Rochester, N. V 
1st Period 
7th Period 
Dec 
2nd Period 
8th Period 
Aug. 
3rd Period 
9th Period 
Mar 
4th Period 
10th Period 
8 9 10 11 12 13 14 
15 16 17 18 19 20 21 
22 23 24 25 26 27 28 
29 30 1 2 3 4 5 
5th Period 
11th Period 
6th Period 
12th Period 
Nov. 
June 
13th Period 
1st 
Day 
Tuesday, January 1, 1935 
Happy New Year 
364 Days 
to come 
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