sharepoint - how to set default value of date column to a date that is 60 days from the current date -

i have column named expiry of date , time type.

i want set default date 60 days current date. expiry should reflect date of after 2 months current date.

i tried under calculated value:

= today + 60

plz help..

you forgot parantheses. tested on local sharepoint:

= [today] + 60 

as calculated value worked me.