Go with 1 and 0. That's what Appendix J says you have and Appendix J is the legal standard.
From Appendix J:
"Full months shall be measured from any point in time on a given date of a given month to the same point in time on the same date of another month....If the unit period is a month, the number of full unit periods between two dates shall be the number of months measured back from the later date."
Counting backwards from 3/29/20 to 2/29/20, you get one full month.
"The remaining fraction of a unit period shall be the number of days measured forward from the earlier date to the beginning of the first full unit period, divided by 30."
Counting forward from 3/29/20 to 3/29/20, you get 0 odd days.