Logseq/Date

• Logseq Date

  • This page defines how dates appear as wikilinks in this garden: which precision, which separator, and when to include the weekday. See Logseq/Frontmatter for which properties take dates and Logseq/Journal for journal page conventions.

  • Date property names

    • date-created:: — when the entity itself was created, published, founded, or released. The dominant date property; see Logseq/Frontmatter/date-created.
    • date-completed:: — when a finite activity (course module, lesson, project) was finished.
    • Use kebab-case date-<verb>:: shape for any new date property. Do not invent <verb>-date:: variants; legacy created-date:: and publication-date:: should be migrated to date-created:: when touched.

  • Format by precision

    • Day (preferred when known) — [[YYYY-MM-DD Day]], e.g. [[2026-05-07 Thu]]. This is the Logseq journal page format, so the link clicks through to that day's journal entry.
    • Day (slash form, acceptable) — [[YYYY/MM/DD]], e.g. [[2024/02/02]]. Used historically and still common, but does not link to the journal page; prefer the dash-with-weekday form for new writes.
    • Month — [[YYYY/MM]], e.g. [[2026/05]].
    • Year — [[YYYY]], e.g. [[1979]].
    • Older Dates Grouped by Century and Decade - 17/4/9 for 1749 or 18/3/2 for 1832. Useful for older dates so as to cluster them together by decade. Maybe eventually decades or centuries will be named or have themes for mnemonic purposes. See Logseq/Entity/Time/Year for the full entity that models this grouping.

  • Rules

    • Most of the time, more precision is preferred if factually confirmed, but not always.
      • For the dates that correspond to when a durable work like a Logseq/Entity/Book was published, it's probably better use use a longer time horizon representation like [[YYYY]]. There's a reason copyright pages don't list "Jan 29, 1946, 3:36 PM Trieste"
    • Do not pad with 01 to fake higher precision (e.g. don't write [[2025-08-01 Fri]] when only the month is known — use [[2025/08]]).
    • Use four-digit years for years starting with 1900. Two-digit-year wikilinks like [[YY/MM]] or [[YY/MM/D]] appear on a handful of legacy pages and should not be copied into new pages as they produce ambiguity with the older dates grouped by century and decade.
    • The weekday in [[YYYY-MM-DD Day]] must be the actual day of the week for that date (Mon, Tue, Wed, Thu, Fri, Sat, Sun).
    • Two-digit-year date components inside page namespaces (e.g. Person/Chris Krycho/Blog/24/02/02/jj init) are a separate naming convention from wikilink dates and are not governed by this page.

  • Disk vs link

    • Journal files on disk are named journals/YYYY_MM_DD.md (underscores).
    • The matching wikilink surface is [[YYYY-MM-DD Day]] (dashes plus weekday).