In DSS you can visualize aggregated time series without coding. Prerequisite: your date column has to be parsed! See how to parse dates with dss
To create a new chart, drag and drop your date parsed column in the X axis. There are two kind of aggregations, the “Timeline” view where you see your data during a lapse of time.
And the regroup view where you see your data aggregated by a date elements, like years, months, or days of weeks:
The aggregation key can be modified in the dropdown of the date column.