Editing Template:MONTHNUMBER

<includeonly>{{#if:{{{1|}}}
 |{{#switch:{{lc:{{{1}}}}}
  |january|jan=1
  |february|feb=2
  |march|mar=3
  |apr|april=4
  |may=5
  |june|jun=6
  |july|jul=7
  |august|aug=8
  |september|sep|sept=9
  |october|oct=10
  |november|nov=11
  |december|dec=12
  |{{#ifexpr:{{{1}}}<0
   |{{#ifexpr:(({{{1}}})round 0)!=({{{1}}})
    |{{#expr:12-(((0.5-({{{1}}}))round 0)mod 12)}}
    |{{#expr:12-(((11.5-({{{1}}}))round 0)mod 12)}}
   }}
  |{{#expr:(((10.5+{{{1}}})round 0)mod 12)+1}}
  }}
 }}
 |Missing required parameter 1=''month''!
}}</includeonly><noinclude>
{{Documentation}}
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</noinclude>