The signature time of the approval document should be filled in in the order and format of the signature to make it look good. The month is on the left side of the diagonal bar, and the day is on the right side of the diagonal bar. For example: 2019 slash 2 slash 9 means February 9, 2019. Standard date format: The standard date format of the Gregorian calendar is: February 9, 2019 or: 2019-02-09.