Hi @msupriya,
As outlined by @wroos you could also do it as shown in the image below using today() under the calculation and keeping the read_only as TRUE with the date question type:

Or, using now() under the calculation and keeping the read_only as TRUE with the date question type as shown in the image below:

Both the approaches will give you the same result as shown in the image below:
Data entry screen as seen in Enketo:

Reference xlsform: Using today()
Default Today’s Date.xlsx (9.5 KB)
Reference xlsform: Using now()
Default Today’s Date.xlsx (9.5 KB)
An alternative way is using the using the same calculation in a constraint. For this, please have a look at the workaround discussed previously:
Have a great day!
