If you do make it monthly, my recommendation is posting it on the 15th of every month, to stagger it with the other regular threads. This way you don't make the start of the month a scramble of postings.
The list of bi-weekly paychecks for 2020 is here: https://www.nfc.usda.gov/Publications/Forms/1217n_20.pdf
Meaning that June's thread should be on the 20th. July on the 18th. August on the 15th. September on the 12th. October on the 10th.