Mall:MONTHNUMBER

<noinclude>{{rpsv.from.wpsv}}</noinclude><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=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}}}}}}|Saknar nödvändig parameter 1=''månad''!}}</includeonly>