Cognito-forms – Specify particular caldender dates only for selection

I am a developer for Cognito Forms.

Since February 2015 the following functionality has been made available:

In this example, I am setting the range on the Start Date field to =DateTime.Today. It could have also been =DateTime.Today.AddDays(1) to be tomorrow or later. Calculations are very robust and should cover most scenarios you can dream up, but you can also just enter literal dates.

I then set the range on the End Date to be at least three days after the Start Date, but no more than seven days. Here is the calculation for the End Date minimum:

And this is how the Start Date appears on the form, with the days before today disabled:

And similarly for the End Date, with both minimum and maximum date restrictions based on the Start Date.

The date range for the End Date automatically updates based on changes to the Start Date, so if an End Date is specified and the Start Date is later changed, validation will catch this if the user does not fix it first.

Please note that range validation applies to Date, Number and Currency fields, not just the dates included in this example.

If you want to have a question with only one answer in Cognito Forms and do not want to use a Dropdown, then you should use Radio Buttons instead. This is the appropriate Choice Type to use when only one answer may be selected.

If you want the ensure the user has intentionally selected an answer, do not specify a default choice and make the question required. This will force them to select a single answer before submitting the form.