All the Hebrew months and holidays are misspelled, so it was probably written by a woman who didn't know Hebrew, likely 'Mechel's widow.

It reads:
My father's Jahrzeit is 10 days in the first Adar.
My grandmother's Jahrzeit is 4 days after Purim, 18 days in Adar.
My mother's Jahrzeit is 4 days before Shavous, 2 days in Sivan.
Mechel's Jahrzeit is 18 days in Kislev.

David Shapiro
Jerusalem