Here is a standard method suitable for mental computation: Take the last two digits of the year. Divide by 4, discarding any fraction. Add the day of the month. Add the month's key value: JFM AMJ JAS OND 144 025 036 146. Subtract 1 for January or February of a leap year. How can I calculate my tax refund? How do I calculate my tax return? How do I calculate my work paycheck? How do I calculate my mileage? How do I calculate my WAM? How do I calculate my net income? How do I calculate my taxable refund? How do I write my day made? How do I calculate my max? How do I calculate my net pay? How do I calculate my income tax return? How do I calculate my day? How do I calculate my RMD for 2022? How do I calculate my monthly net income? How do I calculate my golf handicap? How do I calculate my daily diet? What should I do for my name day? How do I calculate my dividend payment? How do I calculate my payoff date?