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?

1 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.

  • That is good to hear that nLocktime will not be affected then. Thankyou
    – krogoth
    Nov 11, 2021 at 18:44

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