# Cleansing dates

### In this section

* [Changing the date format](https://help.qlik.com/talend/en-US/data-preparation-user-guide/8.0/changing-date-format)
* [Comparing dates](https://help.qlik.com/talend/en-US/data-preparation-user-guide/8.0/comparing-dates)
* [Changing the calendar](https://help.qlik.com/talend/en-US/data-preparation-user-guide/8.0/convert-dates)
* [Converting a calendar to Julian Day](https://help.qlik.com/talend/en-US/data-preparation-user-guide/8.0/converting-calendar-to-julian-day)
* [Calendar types](https://help.qlik.com/talend/en-US/data-preparation-user-guide/8.0/calendar-types)
* [Date Formats](https://help.qlik.com/talend/en-US/data-preparation-user-guide/8.0/date-formats)
* [List of date and date/time formats](https://help.qlik.com/talend/en-US/data-preparation-user-guide/8.0/list-of-date-and-date-time-formats)