UNIX END TIME January 19, 2038 - Will it affect Timelock nLOCKTIME smart contracts past that date?

Question

So UNIX END TIME is January 19, 2038.

• What will happen then to the btc TX that looks at Unixtime for nLOCKTIME transactions?

• Will any Locktime transaction past that date, say to 2040 be an issue? Or will blockchain continue adding to the Unix time like there was no end date?

Answer 1

Timestamps in Bitcoin, including block timestamps and nLocktime values, are unsigned 32-bit.

The last possible timestamp is Feb 7th 2106, at 06:28:15 UTC.