Tết - Calendar and Zodiac Differences

Calendar and Zodiac Differences

The Chinese calendar is based on astronomical observations and therefore dependent on what is considered the local standard time. North Vietnam switched from UTC+8 to UTC+7 on August 8, 1967, with South Vietnam doing likewise in 1975 at the end of the Vietnam War. As a result of the shift, North and South Vietnam celebrated Tết 1968 on different days. The moving backwards of one hour had a similar effect to the 1929 Beijing time change and the effect of this change was also seen with the Winter Solstice of 1984. On Hanoi time the solstice fell on December 21, though on Beijing time the solstice fell on December 22.

As the 11th month of the Chinese calendar must contain the Winter Solstice, it is not the month from November 23, 1984 to December 21, 1984 as per the Vietnamese calendar, but rather the one from December 22, 1984 to January 20, 1985. The effect of this is that the Vietnamese New Year would fall on January 21, 1985, whereas the Chinese New Year would fall on February 20, 1985, a one-month difference. The two calendars agreed again after a leap month lasting from March 21 to April 19 was inserted into the Vietnamese calendar.

In the Vietnamese zodiac, the cat replaces the rabbit in the Chinese zodiac. So, a child born in the Chinese year of the rabbit must also be born in the Vietnamese year of the cat (mẹo/mão). The Vietnamese zodiac uses the same animals as the Chinese zodiac for the remaining 11 years, though the ox or cow of the Chinese zodiac is usually considered to be a water buffalo (sửu/trâu) in the Vietnamese zodiac.

See Chinese zodiac

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