MySQL offers a number of functions for date and time values:
► ADDDATE(date, INTERVAL expr unit) - Adding days to a date. Same as DATE_ADD().
► ADDTIME(time1, time2) - Adding two time values together.
► CURDATE() - Returning the current date. Same as CURRENT_DATE().
► CURTIME() - Returning the current time. Same as CURRENT_TIME().
► DATE(expression) - Returning the date from the expression.
► DATEDIFF(date1, date2) - Returning dates difference in days.
► DATE_ADD(date, INTERVAL expr unit) - Adding days to a date.
► DATE_SUB(date, INTERVAL expr unit) - Subtracting days from a date.
► DATE_FORMAT(date, format) - Returning a character string representing a date.
► DAY(date) - Returning an integer representing the day of the month. Same as DAYOFMONTH()
► DAYNAME(date) - Returning the name of week day.
► DAYOFMONTH(date) - Returning an integer representing the day of the month.
► DAYOFWEEK(date) - Returning an integer representing the day of the week.
► DAYOFYEAR(date) - Returning an integer representing the day of the year.