What is the Year 2038 problem? | HowStuffWorks
https://computer.howstuffworks.com/question75.htm
WebIf you have read How Bits and Bytes Work, you know that a signed 4-byte integer has a maximum value of 2,147,483,647, and this is where the Year 2038 problem comes from. The maximum value of time before it rolls over to a negative (and invalid) value is 2,147,483,647, which translates into January 19, 2038.
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