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CelesteCS Math Plugin: Working with Datetime values - CelesteCS

Date data type support is the one of the most valuable features of CelesteCS Math. With date and time functions one can create pages with information on project dates or show the amount of days till specific date.

The following article will show the common scenarios and date-time function usage examples.

Retrieving specific datetime values

If year, month and day of month are known, the datetime for these values may be retrieved by DATE function, for example:

DATE(2017, 02, 14)

The other way for retrieving specific date is by parsing text value, which may be taken from the Calendar control or any other source. Parsing text into datetime value is performed by DATEVALUE function, for example:

TEXT(DATEVALUE("2016-02-14"),"MM/DD/YY")

Current date and time may be retrieved by NOW function. It is usually used in a conjunction with other date and time functions, for example:

Current year is { YEAR(NOW()) }.

Formatting date and time

Use TEXT function for formatting dates. This function may format currencies, percentages and a lot of other things, but it is most valuable for date and time formatting. The following example shows formatting from one date format into another one:

TEXT(DATEVALUE("2016-02-14"),"MM/DD/YY")

TEXT function supports formatting of both date-only and date-and-time values. It supports a set of commonly used datetime templates, such as:

  • "yyyy-MM-dd HH:mm:ss",
  • "yyyy-MM-dd HH:mm",
  • "dd-MM-yyyy HH:mm a",
  • "dd/MMM/yyyy HH:mm:ss Z",
  • "dd/MMM/yyyy HH:mm",
  • "yyyy-MM-dd",
  • "//dd/MM/yyyy",
  • "dd MMM yyyy",
  • "dd/MMM/yy",
  • "yyyy-MM-dd"

Additionally it supports commonly used templates for US and GERMAN locales. If any additional template is needed, feel free to contact This email address is being protected from spambots. You need JavaScript enabled to view it..

Complex examples

TEXT function may be used for parsing table cell values to be referenced in Math formulas. Here is an example of how to reference cell value and convert it to datetime value:

TEXT(DATEVALUE(Table1.A2),"MM/DD/YYYY")

A frequent example of working with dates is showing the number of days till the release date. DAYS function is used for such calculations. Here is how to accomplish it:

DAYS(NOW(), DATEVALUE(Table1.A2))