GENERAL STANDARD
Official Guidebolt General Design Standard
Language
Standard: English
NATO Phonetic Alphabet, Wikipedia
Keyboard Layout
Standard: QWERTY
Unit System
Standard: METRIC
International System of Units, Wikipedia
Importance: HIGH
Date-Time Format
Standard: ISO-8601
Date Example: 2020-12-31
Time Example: T21:30:11
Combined Example: 2020-12-31T21:30:11
Importance: HIGH
Consistent communication of datetime can save lives. Example, expiry-labels for food that spoils easily and dangerously.
Logic: ISO-8601 is practical and intuitive. It starts with the most useful idea (YEAR) for most applications. It has linear progression of granularity (YEAR then MONTH then DAY then HOUR...). It uses the symbol T, shorthand for time, to clearly separate date from time.