After the calendar reform of January 1, 1873, people tried to perform events on the same dates as the old calendar, but there were cases in which some events were found unseasonable due to the occurrence of the unavoidable one month difference, as stated above, like Koi-nobori (carp rising, or Boy's Day) and Tanabata (the Star Festival).
明治6年(1873年)1月1日の改暦後、旧暦時代の日付をそのまま新暦に持ち込んで行事をしようとすると、前述のとおり絶対に1ヶ月程度ずれるので、鯉幟や七夕のように季節感の合わないものが出てきた。