Well... I submitted the patch with the tests to bug-gnulib mailing list. I think that handling date-format "HH:MM + X minutes" is better than handling "HH:MM +T day ago" (+T means timezone here, +X means relative offset number, HH hours, MM minutes). This is the obscure format currently considered invalid. Just as note: "HH:MM +T yesterday" or "HH:MM +T +X days" works without troubles even in new grammar. It's up on the upstream now.
Well... I submitted the patch with the tests to bug-gnulib mailing list. I think that handling date-format "HH:MM + X minutes" is better than handling "HH:MM +T day ago" (+T means timezone here, +X means relative offset number, HH hours, MM minutes). This is the obscure format currently considered invalid. Just as note: "HH:MM +T yesterday" or "HH:MM +T +X days" works without troubles even in new grammar. It's up on the upstream now.