Proposal: strftime-based calendar/datetime formatting

Looks like I have misunderstood how %EC works (at least on MAC OSX). It just returns the century years:

kip@Kips-iMac-Pro strftime % ./a.out '%EC'
Result string is "20"

Therefore I don’t see a compatible path forward for including era formatting in strftime/2.

So there is no way to get the actual era name in strftime?