saint's day; name day
A Christian term for the feast day of the saint after whom a person is named. Not widely used in everyday Japanese outside religious contexts.
His name day is June 24th.
Compound of 聖名 (seimei, 'holy name') and 祝日 (shukujitsu, 'holiday, festival day'). The exact historical derivation is uncertain; the term is used in Christian contexts for a saint's feast day.