It seems like these problems with defining/describing timezones (i.e., temporal reference systems if you will) are similar to those of defining spatial referenc

It seems like these problems with defining/describing timezones (i.e., temporal reference systems if you will) are similar to those of defining spatial reference systems. Spatial reference systems are fairly rigorously defined/described using both standard (e.g., WKT) and non-standard formats (PROJ strings, EPSG numbers). Is there something similar for temporal reference systems?