EraConvert: Era & Age Calc

EraConvert turns years and dates between the Western calendar and the calendars used across East Asia. Look up a Japanese era year, a Minguo year or a Qing reign year, convert lunar dates in both directions, and work out the age and zodiac sign for any birth date.

• Era years: convert Gregorian years to Japanese eras (Meiji, Taisho, Showa, Heisei, Reiwa), Minguo (Republic of China), Dangi (Korea) and Ming and Qing reign eras, and back again
• Exact era changes: add the month and day to tell Showa 64 from Heisei 1, or Heisei 31 from Reiwa 1
• Lunar calendar: switch between solar and lunar dates, leap months included, for the Chinese calendar (1901-2100) and the Korean calendar (1901-2050)
• Festival dates: Lunar New Year, Lantern Festival, Dragon Boat, Mid-Autumn Festival, Seollal, Daeboreum, Dano and Chuseok for any year
• Age calculator: international age in years, months and days, days lived and the next birthday, for today or any date such as 1 January or 1 April
• East Asian ages: Japanese kazoedoshi, Korean year age and counting age, and Chinese xusui
• Zodiac: Chinese animal, element and stem-branch year by Lunar New Year, plus the Western sun sign
• Birth profile: the Japanese era, Minguo year, Dangi year and lunar birthday of the same date
• Calendar: a month grid with lunar dates, the 24 solar terms and common Chinese and Gregorian festivals, plus a day card with the stem-branch (ganzhi) year, month and day, zodiac and solar term, for 1901-2100
• Four Pillars (BaZi): year, month, day and hour pillars from the birth date, time and time zone, with hidden stems, ten gods, a five-element count and 10-year cycles (Da Yun). For cultural reference and entertainment only, not predictions
• Quick-start presets, saved scenarios with notes, and one-tap sharing of any result

Made for travellers, researchers, families and anyone holding a document dated "Reiwa 8" or a birthday given in the lunar calendar.

About the data: lunar tables follow the Hong Kong Observatory for the Chinese calendar and Korean official data for the Korean calendar. Ming and Qing years follow the lunar calendar, so January and February can fall in the previous reign year. Conversions are for reference, so check the governing source before using a result in an official document. Festival names in the Calendar and the Four Pillars chart are cultural references, not public-holiday dates or predictions. Solar term times are calculated in Beijing time (UTC+8).