Enter the current date and the product of the number of days and years sober into the calculator to determine the sober date.

Sober Date Formula

The following formula can be used to calculate the sober date.

SD = CD - (D * Y)


  • SD is the sober date CD is the current date D is the number of days sober Y is the number of years sober

To calculate the sober date, multiply the number of days sober by the number of years sober. Subtract this result from the current date. This will give you the date when the person became sober.

What is a Sober Date?

A sober date, also known as a sobriety date, is the specific day that an individual with a history of substance abuse or addiction made the decision to stop using and begin their journey towards recovery. This date is often celebrated annually as a milestone of sobriety and a testament to the individual’s strength and commitment to a healthier lifestyle.

How to Calculate Sober Date?

The following steps outline how to calculate the Sober Date using the formula: SD = CD – (D * Y).

  1. First, determine the current date (CD).
  2. Next, determine the number of days sober (D).
  3. Next, determine the number of years sober (Y).
  4. Next, insert the values of CD, D, and Y into the formula: SD = CD – (D * Y).
  5. Finally, calculate the Sober Date (SD).
  6. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem:

Use the following variables as an example problem to test your knowledge.

Current date (CD) = 2022-10-15

Number of days sober (D) = 100

Number of years sober (Y) = 2