right time; appropriate time; season's greetings
Formal noun for a timely moment or opportune occasion. Also used in fixed seasonal greeting phrases like 時宜を得た (timely) and 時宜にかなう (opportune). The 'season's greetings' gloss refers to its use in formal letters or speeches.
His remark was well-timed and appropriate to the occasion.
The prime minister made a timely remark.
I wrote 'seasonal greetings' on the New Year's card.
The response ended up missing the right timing.
適時 and 時宜 are both formal terms for a fitting moment, but 適時 is more common in technical or procedural writing, while 時宜 appears in classical or ceremonial phrasing like 時宜を得た.
Compound of 時 (time) and 宜 (appropriate, good). The exact historical derivation is uncertain, but the combination has been used in formal Japanese to express timeliness.