automation of filling in dates in custom fields

[fmildemberger]

I have a custom field in the form of a date in a form. I need it based on the date chosen in this field to be shown in another field also in the date format 45 days later and in a third field 90 days after the date is added in the first field.. .it is possible?

[cas]

Have a look at the Linked_custom_fileds plugin (you can find that @ github)