For example, a calculation of a daily rate may use an annual total divided by exactly 365.
Interest rates in some banks are calculated using a 365-day calendar.
This includes the Maya Haab' and the Aztec Xiuhpohualli calendars.
Some versions of the Zoroastrian calendar also use a fixed length of 365 days with no rule for leap days, despite potential leap year rules being acknowledged by the 9th century at the latest.
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