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Tenpo is the custom date format. It is written in the format YYMDD.

  1. Years
  2. Months and Days
  3. Leap year


Years are an incremental count of years since 1988, the year I was born, with the first year being year 00. For years lower than 10, a leading zero is added.

Here are some examples for reference:

Months and Days

There are 5 months lasting exctly 73 days each. The months are single letters, A-E. Days are just the number of days within each month from 01 to 73.

Here are the dates that fall within each month:

Leap year

Whenever there is a leap year, that day is annexed and written as A00, so in 2020 the leap year day of 2/29 was 32A00.