DD.MM.YYYY = 13.06.2026
Numbers only, leading zeroes for days and months.
ISO 8601 (YYYY-MM-DD or YYYYMMDD) would be preferred, but is not established (ie. is impractical). The American MM/DD/YYYY is rejected and strongly discouraged.

HH:MM or HH:MM:SS = 22:07 or 22:07:57
24 hours with leading zeroes, typically without seconds.

When talking to Americans, h:mmAM/PM = eg. 7PM, 7:52PM, 11:05AM
Short hour (without leading zeroes) with long minutes, omitted on full hour. AM/PM marker appended without space, both letters capitalized and no points (ie. not a.m.).
May be used for its colloquiality in some other informal settings.
HH:MM:SS AM/PM (= 05:30:21 PM) used as long format. Leading zeroes, AM/PM capitalized with space but still no points.

American English and British English: Clarity-Based, then Consistency-Based, then American English, then Both = Soccer (Clarity), “the police is” (instead of “the police are”, for Consistency), Declarate (Consistency), Democratization (American English), Flat/Apartment (Both) Per case basis, in most cases American is preferred. In many technical contexts British English is preferred, although some exceptions exist.
British English may be used in some cases to sound posh, especially in formal matters.

Non-Standard Clarifying Letters
eg. Zeroes (not zeros), Consentual (not consensual); attempts to eliminate some special rules where appropriate for consistency.
Typically chosen depending on which style maintains previously established word style. If one deviates, the other is chosen.

All sentences end with some punctuation mark (. , ? ! ‽ etc.). Punctuation marks used inside of parentheses or quotation marks do not terminate a sentence (ie. He said “Hello.”. is correct, despite the awkward looking period). This is for clarity and maintaining consistency.

Standard comma rules, Serial comma (Oxford comma) discouraged (considered Non-Standard) but sometimes accepted as useful, particularly in very long lists.