Time format validation

EDITED REPLY, fixes typos

++Adding to the discussion,

As mentioned by @Thom Parker , you've already assigned a validation.

By choosing the HH:MM time notation (all in upper case), you are instructing Acrobat to notate the output in military time format, also known as the 24 hour clock.

In which case, a value of 0200 is read as "zero two hundred hours" (not two hundred hours or 2 am (if using a 12-hour clock).

The issue is that with a 24-hour clock the colon ":" symbol is not needed, but for some reason every computer program or system clock have always included the colon to visually aid the users in identifying what are the hours from the minutes.

See if the error only pops up due to the user typying in "200" or "0200" instead of the full built-in format as "02:00" (with the colon symbol included).

Even if you customize the time notation as "HHMM" (which is actually the proper way to express military time), the Acrobat JavaScript core interpreter will expect to see the colon symbol between hours and minutes notations.

That said, because it is a 24-hour clock, 02:00 ( zero two hundred hours) is understood to be 2 am in the morning, while 14:00 (or forteen hundred hours) means 2 pm in the afternoon respectively.

By selecting a field format, you are also selecting format validation. But the reported error may not be on the field where the time is entered. Is this field used in any calculations?

Can you share the file?