@@ Line 1: / Line 1: @@
+<includeonly>{{#if:{{{1|}}}
-<includeonly>{{#if:{{{1|}}}|{{#switch:{{MONTHNUMBER|{{{1}}}}}|1=January|2=February|3=March|4=April|5=May|6=June|7=July|8=August|9=September|10=October|11=November|12=December|Incorrect required parameter 1=''month''!}}|Missing required parameter 1=''month''!}}</includeonly>
+ |{{#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>