how do you compare monthly figures how to calculate seasonality in a time series how to adjust for variances in monthly aggregate figures how many days are in a monthly aggregate how is the monthly data compared when do you divide monthly to weeks how to adjust for seasonality how to calculate a month in r how to adjust for a seasonality in a time series how does a month compare to a year when does a time series change how do you do variances in time series how to calculate variances in the aggregate monthly figures how to figure holiday day and weekend dates how can i do a cross correlation how to balance saturdays and weekend days how do the monthly aggregates work do you need holidays in a monthly time series? how to do time series with a month why are holidays in a time series