gnucompability(date): dates that contains \v is accepted by gnu but rejected by uu

[HackingRepo]

Hi, uutils mainteners

we confirmed that when testing the uu date command, to reproduce it

relunsec@relunsec:~/software/coreutils/target/debug$ gnudate -d $'Jan 23\v 2026 1:00AM' 
Fri Jan 23 01:00:00 AM EST 2026
relunsec@relunsec:~/software/coreutils/target/debug$ ./date -d $'Jan 23\v 2026 1:00AM' 
date: invalid date 'Jan 23
                           2026 1:00AM'
relunsec@relunsec:~/software/coreutils/target/debug$ 

as you can see gnu see that a valid date while uu date complains, that is divergence