{{#Switch:{{lc:{{Str left|{{Str right|{{{1|}}}|{{#expr:{{Str find long|{{{1|}}}|from}}+4}} }} |3}}}}
|jan=01
|feb=02
|mar=03
|apr=04
|may=05
|jun=06
|jul=07
|aug=08
|sep=09
|oct=10
|nov=11
|dec=12
|00
}}