Weekly 53 pays; or Fortnightly 27 pays per year
In most years there are 52 weekly pays, or 26 fortnightly pays.
However, in some years there are one additional payday (the years vary depending on which day is your payday).
The calendar cycle repeats every 28 years (hat dip to the U.S. Govt Accounting Office for that one).
During the cycle there are 7 leap years.
You can work out how many weeks (or fortnights) there are in total.
Divide the result by 28 – the years in the calendar cycle.
The results accumulate until there is an extra payday; the results fit within a possible range.
The one extra payday occurs within the range specified.
Days – Fortnightly Pay
366 365 Total Paydays
7 21 Days Fortnights per year
2,562 7,665 10,227.0 730.5 26.0893
Excess per year 0.0893, which accumulates.
11 Years = 0.9823 paydays
12 Years = 1.0716 paydays
So, fortnightly paid staff have one additional payday every 11 or 12 years. The long term average (for 10 x 28 year cycles) is 11.2 paydays.
Days – Weekly Pay
366 365 Total Paydates
7 21 Days Weeks per year
2,562 7,665 10,227.0 1461.0 52.1786
Excess per year = 0.1786, which accumulates
5 Years = 0.893 paydays
6 Years = 1.072 paydays
Since there are five ocassions this occurs every 28 years the average occurence is every 5.6 years. Three occasions occur when the payday (eg Wednesday) is the same day as the first and last days of the year (ie both Wednesdays). Two occasons occur due to the impact of leap years when the last day of the year is the day after the regular payday (ie Thursday for a regular Wednesday payday).
So, weekly paid staff have one additional payday every five or six years. It follows a pattern of: 5-6-5-6-6 years that repeats in the 28 year cycle (but starts differently depending on where you begin counting).