Time series analysis involves identifying attributes of your time series data, such as trend and seasonality, by measuring statistical properties.

A selective review of the statistical analysis of time series is given, attention being concentrated on methods for the interpretation of data as contrasted with methods for empirical forecasting.

Emanuel Parzen, An Approach to Time Series Analysis, The Annals of Mathematical Statistics, Vol. 32, No. 4 (Dec., 1961), pp. 951-989 ...