Refactor YAML frontmatter date parsing
Refactor YAML frontmatter date parsing

You can now explicitly specify both the `date_formatted` and `time` meta values to overwrite Pico's page date handling. Specifying `time` doesn't make much sense in general, however, specifying `date_formatted` allows you to use `{{ meta.date_formatted }}` on all systems, even those where `strftime()` doesn't work as wished

picocms/Pico,TakamiChie/Pico,picocms/Pico,PhrozenByte/Pico,TakamiChie/Pico,PhrozenByte/Pico,TakamiChie/Pico,picocms/Pico,TakamiChie/Pico,PhrozenByte/Pico