[3.12] gh-105375: Harden _datetime initialisation (GH-105604) (#105645)

Improve error handling so init bails on the first exception.
(cherry picked from commit 16d49680b56e00c53c00683b949138e584669fd3)

Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com>

Miss Islington (bot) committed 2y ago

36ecbc3570120c55d89eb8695b16525d6e77b454

Parent: 85a1a09

Committed by GitHub <noreply@github.com> on 6/11/2023, 10:46:33 AM