For what it’s worth, SAS can add months to time points with the aid of an alignment parameter, so 01JAN2021 + 1 month would be 01FEB2021 with beginning alignmen

For what it’s worth, SAS can add months to time points with the aid of an alignment parameter, so 01JAN2021 + 1 month would be 01FEB2021 with beginning alignment and 28FEB2021 with end alignment. There is also middle and sameday alignment. This is the snappily named intnx function. I guess that’s an honest name in the sense that it is very suggestive of needing to read the documentation before using it.