bug#40220: date command set linux epoch time failed

[Paul Eggert]

On 3/29/20 9:32 PM, Bob Proulx wrote:
> Both calls from GNU date are returning EINVAL.  Those are Linux kernel
> system calls.  Those Linux kernel system calls are using
> CLOCK_MONOTONIC.

OK, I think I understand now. For some reason Linux prohibits you from setting 
CLOCK_REALTIME to a value less than what CLOCK_MONOTONIC would report. I don't 
know why Linux has this restriction - it violates POSIX as near as I can tell - 
but at any rate as you say it's a problem with the Linux kernel, not with GNU 
'date'.