[O] Computing dates in properties?

[Jay Iyer]

Hi,

Is it possible to perform simple calculations in properties like in the example below?  If so, please provide pointers.

Thanks,

-jay

** Headline 1

:PROPERTIES:

:CUSTOM_ID: headline_1

:DATE: [2016-07-07 Thu]

:END:

** Headline 2

:PROPERTIES:

:CUSTOM_ID: headline_2

:DATE: [date from headline 1 + 3 days]

:END: