upgrade-checklist/datetime.md

## DateTime in Mysql JCB Settings
In Joomla 3 we were used to setting the default for a datetime field to 0000-00-00 00:00:00. Since J4 (because of the mysql 8.0 requirement) that is no longer a valid default value. So it should be set to NULL. 

To do so, you would change your field settings to these:

Data default = Other\
Other Default = EMPTY\
Null switch = NULL
Added info about datetime changes in J4 2024-05-28 07:53:41 +00:00			`## DateTime in Mysql JCB Settings`
			`In Joomla 3 we were used to setting the default for a datetime field to 0000-00-00 00:00:00. Since J4 (because of the mysql 8.0 requirement) that is no longer a valid default value. So it should be set to NULL.`

			`To do so, you would change your field settings to these:`
Update datetime.md 2024-05-28 07:55:00 +00:00
			`Data default = Other\`
			`Other Default = EMPTY\`
Added info about datetime changes in J4 2024-05-28 07:53:41 +00:00			`Null switch = NULL`