My favourite standard is the Week Date (or Week Number) format in ISO 8601.

Enjoy some unrelated quotes below:

• "If you can't describe what you are doing as a process, you don't know what you're doing." - W. Edwards Deming

• A complex system that works is invariably found to have evolved from a simple system that worked. A complex system designed from scratch never works and cannot be patched up to make it work. You have to start over with a working simple system. – John Gall