WIKI says, "Key the month as an abbreviation from the birth date using the dictionary provided for assistance."

This goes for ALL dates.

January = Jan
February = Feb
March = Mar
April = Apr
May = May
June = Jun
July = Jul
August = Aug
September = Sep
October = Oct
November = Nov
December = Dec

Many keyers are spelling out the name of the month on each date record.

Do you want to improve your accuracy rating? READ THE WIKI!!!!!