What calendar is the chinese zodiac

Its based on a Lunar calendar

Explanation:

workers should be given a fair share of the wealth their work creates

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mount st. helens in washington erupts, causing a massive avalanche and killing 57 people on this day in 1980. ash from the volcanic eruption fell as far away as minnesota. seismic activity at mount st. helens, which is 96 miles south of seattle, began on march 16.