Withdrawals are processed on the 15th of each month. To be eligible for a withdrawal on the 15th you must have requested the payment by the last day of the previous month.
For example, to receive a payment on the 15th February, you'd need to make your withdrawal request on or before 31st January. Envato is an Australian company, therefore the deadline for making a withdrawal is 23:59:59.
Please note: If the 15th day of the month falls on a weekend or an Australian public holiday then withdrawals will be processed the following business day.