"dd" in a date of birth refers to the day of the month. It's used as a placeholder in date formats to represent the specific day number.
For example:
- dd/mm/yyyy: This format represents the date as "day/month/year". So, if your birthday is on the 15th of June, you would write it as 15/06/1990.
- mm/dd/yyyy: This format represents the date as "month/day/year". In this case, your birthday would be written as 06/15/1990.
The specific format used for dates can vary depending on the region or system you are using.
