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Introduction
Date and Time Related Extensions
PHP Manual

# Date and Time

- Introduction
- Installing/Configuring
  - Requirements
  - Installation
  - Runtime Configuration
  - Resource Types
- Predefined Constants
- DateTime — The DateTime class
  - DateTime::add — Adds an amount of days, months, years, hours, minutes and seconds to a DateTime object
  - DateTime::__construct — Returns new DateTime object
  - DateTime::createFromFormat — Returns new DateTime object formatted according to the specified format
  - DateTime::getLastErrors — Returns the warnings and errors
  - DateTime::modify — Alters the timestamp
  - DateTime::__set_state — The __set_state handler
  - DateTime::setDate — Sets the date
  - DateTime::setISODate — Sets the ISO date
  - DateTime::setTime — Sets the time
  - DateTime::setTimestamp — Sets the date and time based on an Unix timestamp
  - DateTime::setTimezone — Sets the time zone for the DateTime object
  - DateTime::sub — Subtracts an amount of days, months, years, hours, minutes and seconds from a DateTime object
- DateTimeImmutable — The DateTimeImmutable class
  - DateTimeImmutable::add — Adds an amount of days, months, years, hours, minutes and seconds
  - DateTimeImmutable::__construct — Returns new DateTimeImmutable object
  - DateTimeImmutable::createFromFormat — Returns new DateTimeImmutable object formatted according to the specified format
  - DateTimeImmutable::getLastErrors — Returns the warnings and errors
  - DateTimeImmutable::modify — Alters the timestamp
  - DateTimeImmutable::__set_state — The __set_state handler
  - DateTimeImmutable::setDate — Sets the date
  - DateTimeImmutable::setISODate — Sets the ISO date
  - DateTimeImmutable::setTime — Sets the time
  - DateTimeImmutable::setTimestamp — Sets the date and time based on an Unix timestamp
  - DateTimeImmutable::setTimezone — Sets the time zone
  - DateTimeImmutable::sub — Subtracts an amount of days, months, years, hours, minutes and seconds
- DateTimeInterface — The DateTimeInterface interface
  - DateTime::diff — Returns the difference between two DateTime objects
  - DateTime::format — Returns date formatted according to given format
  - DateTime::getOffset — Returns the timezone offset
  - DateTime::getTimestamp — Gets the Unix timestamp
  - DateTime::getTimezone — Return time zone relative to given DateTime
  - DateTime::__wakeup — The __wakeup handler
- DateTimeZone — The DateTimeZone class
  - DateTimeZone::__construct — Creates new DateTimeZone object
  - DateTimeZone::getLocation — Returns location information for a timezone
  - DateTimeZone::getName — Returns the name of the timezone
  - DateTimeZone::getOffset — Returns the timezone offset from GMT
  - DateTimeZone::getTransitions — Returns all transitions for the timezone
  - DateTimeZone::listAbbreviations — Returns associative array containing dst, offset and the timezone name
  - DateTimeZone::listIdentifiers — Returns a numerically indexed array containing all defined timezone identifiers
- DateInterval — The DateInterval class
  - DateInterval::__construct — Creates a new DateInterval object
  - DateInterval::createFromDateString — Sets up a DateInterval from the relative parts of the string
  - DateInterval::format — Formats the interval
- DatePeriod — The DatePeriod class
  - DatePeriod::__construct — Creates a new DatePeriod object
- Date/Time Functions
  - 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
  - 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
- Supported Date and Time Formats
  - Time Formats
  - Date Formats
  - Compound Formats
  - Relative Formats
- List of Supported Timezones
  - Africa
  - America
  - Antarctica
  - Arctic
  - Asia
  - Atlantic
  - Australia
  - Europe
  - Indian
  - Pacific
  - Others

unixtojd
Introduction
Date and Time Related Extensions
PHP Manual