The Ready Store used a modified version of the Julian Calendar.

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We often get the question of why an MRE doesn't have an expiration date printed on it. For example, for England and its colonies, the change did not occur until September 1752. MRE's use Julian Dates because they originated with the military.

You may have noticed that your MRE's have a funny number at the bottom. The time scale that is the basis for Julian dates is Universal Time.

The first number of the Julian Date represents the year.

The last three numbers represent the day that it was manufactured.

The changeover from the Julian calendar to the Gregorian calendar occurred in October of 1582, according to the scheme instituted by Pope Gregory XIII.

Julian dates are widely used as time variables within astronomical software.So for example, if the manufacture date was listed as 1067 that would mean that the MRE was manufactured on March 7, 2011.You can read our previous blog post on how to figure out the manufacture date of your MRE.MREs, which are manufactured by the same companies who provides MREs to the military, will continue to use the Julian Calendar system and we have no ability to influence a change.You can learn more about decoding the MRE manufacture dates here.After locating your manufacture date, use this conversion chart to figure out the date of your MRE.