Global date functions are listed here.
 XlSerialToDate | Transform an Excel serial date to year, month and day | 
 XlLSerialToDate | Transform an integer Excel serial date to year, month and day | 
 XlDateToSerial | Transform year, month and day to an Excel serial date | 
 XlDateToLSerial | Transform year, month and day to an Excel serial date | 
 XlStringToDate | Transform a string to year, month and day | 
 XlStringToSerial | Transform a string to a serial date | 
 XlStringToLSerial | Transform a string to a serial date | 
 XlToday | Get today's date | 
 XlNow | Get the current time | 
 XlWeekday | Convert a date to a day of the week |