Last Updated: 2024-04-15

When in doubt, always store and transfer dates in ISO 8601, the most popular standard.

Some reasons why?

1. SQL DBs use it:

• DATE - format YYYY-MM-DD
• DATIME - format: YYYY-MM-DD HH:MI:SS

2. ISO 8601 gets output by JavaScript's Date toJSON method

• starts off same as DB (but has a few optional extras)

YYYY-MM-DDTHH:MI:SS.MSSZ - e.g 2012-04-23T18:25:43.511Z

3. Many backend frameworks (e.g. Laravel) work out of the box with it.

e.g. you get date time validations working without any messing around

Resources

• https://en.wikipedia.org/wiki/ISO_8601