We used different ways to develop this :-)

[Utopism]

Hi we have developed the same feature, sorry to discover your plugin too late.

Can we consider to merge ?
https://github.com/Smile-SA/redmine_datetime_custom_field

[nanego]

Hi @Utopism. I will have a look at your plugin.
We could consider a merge if our approaches are compatible.

[Utopism]

Hi @nanego I think the developper that created our plugin started with your plugin as a code base.
Our plugin approach is different : we add a new Format, without changing the Date Format.

Perhaps we can consider using the same codebase in a shared plugin ?