[jefftk]

It could be "foo.tld2022", with YYYY registrable only in that year. Won't get in the way of future folks.

[dane-pgp]

For memorials, it could be as uniform as firstname.lastname.disambiguation.birthyear.deathyear with the requirement that each person could only register one domain under the birthyear.deathyear root.

To get around the problem of a numeric TLD, I suggest using Roman numerals (and telling Myanmar it has to go back to using .bu).