ROC Year Converter
Convert ROC (Minguo) years and dates to Gregorian and back, with formats like 113/05/01 and 1130501, plus weekday and zodiac.
Four-digit years are Gregorian; three digits or fewer are ROC (Minguo). Add 民國, 民前 or 西元 to be explicit.
Result
Enter an ROC or Gregorian year or date to see it in the other calendar and in common formats.
How to use
- Type an ROC or Gregorian year or date into “Year or date”, such as 113, 113/05/01, 1130501 or 2024-05-01, or click “Today” or “Example”.
- The calendar is detected automatically: four-digit years are Gregorian, three digits or fewer are ROC. For Gregorian years before 1000, add 西元, e.g. “西元 800”.
- For years before ROC year 1 (1912), use 民前, e.g. “民前 1 年” is 1911.
- The result lists the ROC, Gregorian and ISO 8601 forms, plus the day of week, zodiac sign and sexagenary year. Click “Copy” next to any of them.
FAQ
How do ROC years relate to Gregorian years?
Gregorian year = ROC year + 1911. ROC year 113 is 2024. ROC year 1 (民國元年) is 1912, when the Republic of China was founded; there is no year 0. Taiwan uses ROC years on official documents, invoices and ID cards.
What about years before 1912?
They are counted backwards as 民前 (“before the Republic”): 民前 1 is 1911, and 民前 N is 1912 − N. For example, 1900 is 民前 12.
Which date formats are supported?
ROC: 113/05/01, 113-5-1, 113.5.1, 1130501 (seven digits; pad years below 100 with a zero, e.g. 0990101), 113年5月1日, 民國113年5月1日 and 民國元年. Gregorian: 2024-05-01, 2024/5/1, 20240501 and 2024年5月1日. Full-width digits and a trailing weekday such as (三) are accepted too.
Why is a six-digit date like 990101 rejected?
It could mean ROC 99/01/01 or January 2099, so the tool does not guess. Government and bank systems pad the ROC year to three digits: enter 0990101.
Is the zodiac sign exact?
The zodiac sign and sexagenary year are based on the Gregorian year. The zodiac year actually begins at Lunar New Year, so someone born in January or early February may belong to the previous sign.
Does the weekday work for dates before 1912?
Yes, using the modern Gregorian calendar extended backwards. Historical documents from Taiwan before 1912 used other calendars, so their dates may need a separate lookup.
Is the date I type uploaded?
No. Everything is converted in your browser and never leaves your device.
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