Convert between a calendar date, the JD Edwards (CYYDDD) Julian date, YYYYMMDD, day-of-year, and every common date piece. Type into any field on the left and everything updates. All local — nothing is uploaded.
CYYDDD — one century digit (0 = 1900s, 1 = 2000s), two year digits, and the three-digit day of the year. So 126001 is day 001 of 2026 = January 1, 2026. Databases often drop the leading zero on 1900s dates, so a 5-digit value like 98129 is read as 098129 = May 9, 1998. This is not the astronomical Julian Day Number (a count of days since 4713 BC) — same name, different system.
Writes one row per day with every format column — handy for a full-year reference table. Defaults to the whole current year; change the dates for any subset.