9 calls to date_is_valid() in Date 6

DateAPI::testDateAPI in tests/date_api.test

date_convert_from_custom in ./date_api_elements.inc

Convert a date input in a custom format to a standard date type

date_limit_value in ./date_api.module

Recalculate a date so it only includes elements from a granularity array. Helps prevent errors when unwanted values round up and ensures that unwanted date part values don't get stored in the database.

date_make_date in ./date_api.module

Convert a date of any type or an array of date parts into a valid date object.

date_php4.inc in date_php4/date_php4.inc

date_popup_input_value in date_popup/date_popup.module

Helper function for extracting a date value out of user input.

date_select_input_value in ./date_api_elements.inc

Helper function for extracting a date value out of user input.

date_text_input_value in ./date_api_elements.inc

Helper function for extracting a date value out of user input.

_date_field_validate in date/date_elements.inc

Private implementation of hook_field validate operation.