* DATE
*
* The DATE function returns a value that represents a particular date.
*
* NOTE: When used in a Cell Formula, MS Excel changes the cell format so that it matches the date
* format of your regional settings. PHPExcel does not change…
* DATENOW
*
* Returns the current date.
* The NOW function is useful when you need to display the current date and time on a worksheet or
* calculate a value based on the current date and time, and have that value updated each time you
*…
* DAYOFMONTH
*
* Returns the day of the month, for a specified date. The day is given as an integer
* ranging from 1 to 31.
*
* Excel Function:
* DAY(dateValue)
*
*
* DAYOFWEEK
*
* Returns the day of the week for a specified date. The day is given as an integer
* ranging from 0 to 7 (dependent on the requested style).
*
* Excel Function:
* WEEKDAY(dateValue[,style])
*
*
* DAYS360
*
* Returns the number of days between two dates based on a 360-day year (twelve 30-day months),
* which is used in some accounting calculations. Use this function to help compute payments if
* your accounting system is based on…
* MONTHOFYEAR
*
* Returns the month of a date represented by a serial number.
* The month is given as an integer, ranging from 1 (January) to 12 (December).
*
* Excel Function:
* MONTH(dateValue)
*
*
* WEEKOFYEAR
*
* Returns the week of the year for a specified date.
* The WEEKNUM function considers the week containing January 1 to be the first week of the year.
* However, there is a European standard that defines the first week as the one…
* WORKDAY
*
* Returns the date that is the indicated number of working days before or after a date (the
* starting date). Working days exclude weekends and any dates identified as holidays.
* Use WORKDAY to exclude weekends or holidays when…
* YEAR
*
* Returns the year corresponding to a date.
* The year is returned as an integer in the range 1900-9999.
*
* Excel Function:
* YEAR(dateValue)
*
*