Our test for whether this is a Date argument or filter needs to include a check that the field was actually processed by Date Views. Some dates are not.

Issue #1379172 by deviantpixel, Note that the Date Repeat form uses a function that was re-named in 7.8.

Store the locale format in a static cache to avoid re-computing it dozens of times on calendar views.

Fix to new default date handling, the default date has to set a date in the database timezone, not the display timezone.

Issue #1245106 by Gábor Hojtsy, Hide the option to add the delta into the view for single value fields.

Issue #1370876, Make sure new Date All Day code does not try to set the popup values if Date Popup is disabled.

Issue #874322, Add back the date_field_all_day() function to avoid breaking other modules that are using it.

Issue #1236216, Start the process of moving the repeating date integration out of the Date module and into a separate, Date Repeat Field module.

Fix Date text placeholder to display a formatted date instead of a format. Follow up to Date repeat UI changes.

Issue #874322, The All Day functionality has been moved into a separate module and hooks were added to make it easier for other modules to inject steps into date processing.

Issue #1267046, The UNTIL date was not getting included in repeating results. This should now be fixed, but is an API change of sorts for anyone who worked around it by setting it ahead.

Issue #1266536, Keep timezone adjustments from altering the values for repeating date EXCEPTIONS and ADDITIONS.

Another folloup to the last commit. Document the reason why we need the time modifier in the calc code.

Issue #1362758, Add empty file for the date_plugin_display_attachment.inc file that was removed, to avoid fatal errors if it is missing on a site that formerly used it.

 Issue #1363460, Make sure widget dates do not end up with the current date when they should be empty.