# Date Functions | **Function** | **Description** | | -------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | [Add Days](https://doc.sysdevmobile.com/kalipso5/developing/form/expressions/functions/functions-descriptions/date-functions/add-days) | Returns the date resultant of adding days to the specified date. | | [Date Difference](https://doc.sysdevmobile.com/kalipso5/developing/form/expressions/functions/functions-descriptions/date-functions/date-difference) | Returns the corresponding Char of the specified ASCII code. | | [DateTime Add](https://doc.sysdevmobile.com/kalipso5/developing/form/expressions/functions/functions-descriptions/date-functions/datetime-add) | To complete a string with the specified chars until it reaches the specified length. | | [DateTime Diff](https://doc.sysdevmobile.com/kalipso5/developing/form/expressions/functions/functions-descriptions/date-functions/datetime-diff) | Converts a date to a string in the specified format. | | [DateTime Sub](https://doc.sysdevmobile.com/kalipso5/developing/form/expressions/functions/functions-descriptions/date-functions/datetime-sub) | Converts all the occurrences of "\" in a string into the corresponding Char. | | [DateToString](https://doc.sysdevmobile.com/kalipso5/developing/form/expressions/functions/functions-descriptions/date-functions/datetostring) | Converts a date to a string in the specified format. | | [Day](https://doc.sysdevmobile.com/kalipso5/developing/form/expressions/functions/functions-descriptions/date-functions/day) | Returns the Day of the specified date. | | [Get System´s Date](https://doc.sysdevmobile.com/kalipso5/developing/form/expressions/functions/functions-descriptions/date-functions/get-system-s-date) | Returns the system date. | | [Julian](https://doc.sysdevmobile.com/kalipso5/developing/form/expressions/functions/functions-descriptions/date-functions/julian) | Returns a Global Unique Identifier. | | [Local To UTC Time](https://doc.sysdevmobile.com/kalipso5/developing/form/expressions/functions/functions-descriptions/date-functions/local-to-utc-time) | This Function returns a *\*, which is the specified Date Time converted to the Coordinated Universal Time, according to the Time Zone defined in the system. | | [Month](https://doc.sysdevmobile.com/kalipso5/developing/form/expressions/functions/functions-descriptions/date-functions/month) | Returns the Month of the specified date. | | [Subtract Days](https://doc.sysdevmobile.com/kalipso5/developing/form/expressions/functions/functions-descriptions/date-functions/subtract-days) | Returns the date resultant of subtracting days from the specified date. | | [TimeToString](https://doc.sysdevmobile.com/kalipso5/developing/form/expressions/functions/functions-descriptions/date-functions/timetostring) | Converts a time to a string in the specified format. | | [UTC To Local Time](https://doc.sysdevmobile.com/kalipso5/developing/form/expressions/functions/functions-descriptions/date-functions/utc-to-local-time) | This Function returns a *\*, which is the specified Date Time converted from the Coordinated Universal Time to the Time Zone defined in the system. | | [Week Day](https://doc.sysdevmobile.com/kalipso5/developing/form/expressions/functions/functions-descriptions/date-functions/week-day) | Returns the week day of the specified date. | | [Week Number](https://doc.sysdevmobile.com/kalipso5/developing/form/expressions/functions/functions-descriptions/date-functions/week-number) | This Function returns a *\*, which is the number of the week of the specified Source Date. | | [Year](https://doc.sysdevmobile.com/kalipso5/developing/form/expressions/functions/functions-descriptions/date-functions/year-1) | Returns the Year of the specified date. |