Issue number: Internal
---------
<!-- Please do not submit updates to dependencies unless it fixes an
issue. -->
<!-- Please try to limit your pull request to one type (bugfix, feature,
etc). Submit multiple pull requests if needed. -->
## What is the current behavior?
<!-- Please describe the current behavior that you are modifying. -->
The Datetime header and time button have default date formatting that
cannot be set by the developer.
## What is the new behavior?
<!-- Please describe the behavior or changes that are being added by
this PR. -->
- The developer can customize the date and time formatting for the
Datetime header and time button
- A warning will appear in the console if they try to provide a time
zone (the time zone will not get used)
## Does this introduce a breaking change?
- [ ] Yes
- [x] No
<!--
  If this introduces a breaking change:
1. Describe the impact and migration path for existing applications
below.
  2. Update the BREAKING.md file with the breaking change.
3. Add "BREAKING CHANGE: [...]" to the commit description when merging.
See
https://github.com/ionic-team/ionic-framework/blob/main/.github/CONTRIBUTING.md#footer
for more information.
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## Other information
Any other information that is important to this PR such as screenshots
of how the component looks before and after the change. -->
---------
Co-authored-by: ionitron <hi@ionicframework.com>

Issue number: Internal
---------
<!-- Please do not submit updates to dependencies unless it fixes an
issue. -->
<!-- Please try to limit your pull request to one type (bugfix, feature,
etc). Submit multiple pull requests if needed. -->
## What is the current behavior?
<!-- Please describe the current behavior that you are modifying. -->
The Datetime Button has default date formatting that cannot be set by
the developer.
## What is the new behavior?
<!-- Please describe the behavior or changes that are being added by
this PR. -->
- The developer can customize the date and time formatting for the
Datetime Button
- A warning will be logged if they do not include the `date` or `time`
object for formatOptions as needed for the presentation of the Datetime
## Does this introduce a breaking change?
- [ ] Yes
- [x] No
<!--
  If this introduces a breaking change:
1. Describe the impact and migration path for existing applications
below.
  2. Update the BREAKING.md file with the breaking change.
3. Add "BREAKING CHANGE: [...]" to the commit description when merging.
See
https://github.com/ionic-team/ionic-framework/blob/main/.github/CONTRIBUTING.md#footer
for more information.
-->
---------
Co-authored-by: Liam DeBeasi <liamdebeasi@users.noreply.github.com>