Run addition and subtraction operations on today's date. A plugin for Statamic (v1).
The {{ current_datemath }} tag accepts integers in add and subtract parameters. As you might expect, add increases the date by the provided number of days while subtract decreases the date.
The tag also accepts the standard format parameter found in the {{ current_date }} tag.
If today is 2015-08-10, {{ current_datemath add="10" }} will return 2015-08-20.
If today is 2015-08-10, {{ current_datemath minus="10" format="F jS"}} will return July 31st.