Date warnings in logs

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Describe the problem you’re having:

Whenever I subscribe to a new feed I get errors about the date function in the system log

If possible include steps to reproduce the problem:

add a new feed, and wait for tt-rss to update

tt-rss version (including git commit id):

Tiny Tiny RSS v19.8 (8e8fd73)

Platform (i.e. Linux distro, PHP, PostgreSQL, etc) versions:

Raspbian, Postgresql 11, PHP 7.2

Please provide any additional information below:

I think the bug was introduced in commit b0d67cd3d0.

this should probably fix it: https://git.tt-rss.org/fox/tt-rss/commit/4e05008aaca008af231eaebfe88abaf058da209a

That was easy, thanks!

Fixed!