祭日|さいじつsaijitsu[0]heiban (flat)

1. no-adjectivenational holiday; festival day
   今度こんどの祭日さいじつは日曜日にちようびと重かさなります。↗

   The next holiday falls on a Sunday.

• Synonym祝日しゅくじつNeutralThe modern official term for national holidays (「国民の祝日」); 「祭日」 originally meant days of rites and is now an old name.
• Related休日きゅうじつNeutralAny day off, as in 「休日出勤」; covers weekends and holidays alike, so its range is the broadest of the group.
• Related公休日こうきゅうびWrittenA legally designated day off, or a day employees rest under set rules; the word leans toward written, formal prose.
• Related公休こうきゅうNeutralAn employee's regular day off or a shop's regular closing day; used mostly in workplace settings.
• Related祝祭日しゅくさいじつNeutralA collective term for holidays and festival days, as in 「日曜・祝祭日休み」; seen mostly in notices and signs.
• Antonym平日へいじつNeutralA weekday — any day that is not Sunday or a holiday; the direct opposite of 「祭日」.

National holidays are officially 「祝日」 today; 「祭日」 is the old name. 「祝祭日」 turns up in notices like 「日曜・祝祭日休み」. Any day off is 「休日」; the opposite of a holiday is 「平日」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 祭まつりの日ひ。