How many seconds in 1 millennium?
The answer is 31536000000.
We assume you are converting between second and millennium.
You can view more details on each measurement unit: seconds or
millennium
The SI base unit for time is the second.
1 second is equal to 3.1709791983765E-11 millennium.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between seconds and millennia.
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The second (symbol s) is a unit for time, and one of seven SI base units. It is defined as the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom at zero kelvins.

››Definition: Millennium

A millennium is a period of time equal to one thousand years. There are two main viewpoints about naming millennia and there was a popular debate leading up to the celebrations of the year 2000 as to whether 2000 was the beginning of a new millennium. Historically, there has been debate around the turn of the millennium, centuries and decades before.

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