Date of follow up visit to date of enrollment

[Kal_Lam]

@Priyanka, this post discussed previously should help you solve your issue:

Constraint and restrict date entries with a special date (if not known) or a range of known dates

@christian_silvera, you could use the following constraint as shown in the image below: In the survey tab of your XLSForm: [Image 1] Data entry screen as seen in Enketo: accepting 1900-01-01 when a date is unknown [Image 2] Data entry screen as seen in Enketo: rejecting a date that is above 1900-01-01 and below 2021-01-01 [Image 4.5] Data entry screen as seen in Enketo: accepting a date that is 2021-01-01 and above [Image 3] Data entry screen as seen in Enketo: accepting a date th…