@seldo 30-day trailing "months" for the win

@xian @seldo No, no, trailing 28 days. Always use an even number of weeks, because lots of things have weekly patterns, so if you use something that isn't a multiple of 7 days, you end up introducing a bit of a "beat" to the time series depending on how many weekends your trailing days include.

@abulsme @seldo good point, just be prepared to have 13 of them in a year lol