> For the complete documentation index, see [llms.txt](https://resources.less.tech/less-tech/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://resources.less.tech/less-tech/modelling/action-guides/new-columns/date-math.md). # Date Math Add or subtract days, seconds or hours from existing date columns

With the Date Math Action, you can create new columns by adding time units to existing date columns. In the video below, we walk through a couple of examples of how to configure and use the Action. {% embed url="" %}