Originally Posted by
ERflyer
Hint: Use 01 as your “number” in your password. Every 90 days add 1 to it so it then becomes 02, 03, .......
You’re good for 99 changes. Most pilots can remember four to five digits for frequency changes so two should be a piece of cake.

Add in the year with it and it’ll be unlimited through a career (1901, 1902 or reversed order). Ironically, it’s made my password that much more predictable.