The only difference between the conditional waiver of progress payment and unconditional waiver on progress payment form format is that in the financial institution detail section of the unconditional waiver, you only need to fill up the amount that you are expected to receive.
Rhyme to remember number of days in each month: 30 days has September, April, June, and November. When short February's done. All the rest have 31... Thirty days hath September, April, June, and November, all the rest have thirty-one.
So on average, the combination of any 3 days occuring 5 times in a calendar month will happen once a year. In any given year, there are only 6 such combinations of days. This is because 2 months with 31 days start on the same weekday.