Answer

“Baras” usually means twelve in English.

Explanation

In Jain/Gujarati usage, if “baras” is referring to a tithi or day count, it can mean the twelfth day.

So depending on the line in mangal divo, it may be translated as:

• twelve
• twelfth
• twelfth day

Takeaway

If you share the full line from the mangal divo, I can give you the exact English meaning more precisely.