From 2001, the National Astronomical Observatory of Japan started to call July 7 of the old calendar as "traditional tanabata" and announced the date of the new calendar day that coincides with it on the grounds that stars are often invisible since July 7 of the new calendar falls in the midst of the rainy season.
国立天文台では2001年から、「新暦7月7日はたいてい梅雨のさなかでなかなか星も見られない」という理由で、旧暦7月7日を「伝統的七夕」と呼び、その日の新暦での日付を広く報じている。