# Date/Time Functions

## Table of Contents

- checkdate — Validate a Gregorian date
- date_add — Alias of DateTime::add
- date_create_from_format — Alias of DateTime::createFromFormat
- date_create_immutable_from_format — Alias of DateTimeImmutable::createFromFormat
- date_create_immutable — Alias of DateTimeImmutable::__construct
- date_create — Alias of DateTime::__construct
- date_date_set — Alias of DateTime::setDate
- date_default_timezone_get — Gets the default timezone used by all date/time functions in a script
- date_default_timezone_set — Sets the default timezone used by all date/time functions in a script
- date_diff — Alias of DateTime::diff
- date_format — Alias of DateTime::format
- date_get_last_errors — Alias of DateTime::getLastErrors
- date_interval_create_from_date_string — Alias of DateInterval::createFromDateString
- date_interval_format — Alias of DateInterval::format
- date_isodate_set — Alias of DateTime::setISODate
- date_modify — Alias of DateTime::modify
- date_offset_get — Alias of DateTime::getOffset
- date_parse_from_format — Get info about given date formatted according to the specified format
- date_parse — Returns associative array with detailed info about given date/time
- date_sub — Alias of DateTime::sub
- date_sun_info — Returns an array with information about sunset/sunrise and twilight begin/end
- date_sunrise — Returns time of sunrise for a given day and location
- date_sunset — Returns time of sunset for a given day and location
- date_time_set — Alias of DateTime::setTime
- date_timestamp_get — Alias of DateTime::getTimestamp
- date_timestamp_set — Alias of DateTime::setTimestamp
- date_timezone_get — Alias of DateTime::getTimezone
- date_timezone_set — Alias of DateTime::setTimezone
- date — Format a local time/date
- getdate — Get date/time information
- gettimeofday — Get current time
- gmdate — Format a GMT/UTC date/time
- gmmktime — Get Unix timestamp for a GMT date
- gmstrftime — Format a GMT/UTC time/date according to locale settings
- idate — Format a local time/date as integer
- localtime — Get the local time
- microtime — Return current Unix timestamp with microseconds
- mktime — Get Unix timestamp for a date
- strftime — Format a local time/date according to locale settings
- strptime — Parse a time/date generated with strftime
- strtotime — Parse about any English textual datetime description into a Unix timestamp
- time — Return current Unix timestamp
- timezone_abbreviations_list — Alias of DateTimeZone::listAbbreviations
- timezone_identifiers_list — Alias of DateTimeZone::listIdentifiers
- timezone_location_get — Alias of DateTimeZone::getLocation
- timezone_name_from_abbr — Returns the timezone name from abbreviation
- timezone_name_get — Alias of DateTimeZone::getName
- timezone_offset_get — Alias of DateTimeZone::getOffset
- timezone_open — Alias of DateTimeZone::__construct
- timezone_transitions_get — Alias of DateTimeZone::getTransitions
- timezone_version_get — Gets the version of the timezonedb