Not on a savings bond.
Interest is added by the month so if you know the month and year, that is better than nothing. Either way, the interest will stop accruing after 30 years, so you can add a date that is 30 years and 1 day.
https://www.treasurydirect.gov/indiv/research/indepth/ebonds/res_e_bonds_eeratesandterms_increaseinv...
