On the afternoon of July 31, 2014 I noticed the following behaviour:
{{#time:Y-m}} => 2014-07
{{#time:Y-m|now -1 months}} => 2014-07 (<-same month?)
{{#time:Y-m|now -2 months}} => 2014-05
By Aug 1st, the same functions yield as expected:
{{#time:Y-m}} => 2014-08
{{#time:Y-m|now -1 months}} => 2014-07
{{#time:Y-m|now -2 months}} => 2014-06
Am I just using the function wrong? Tried it on my mediawiki.org talk page too with the same result. Are adjustments by month not doing what I think? Thanks!