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#time (4)

Cheat sheets (4)

dayjs — Tiny Immutable Date Library

Package-level reference for the Day.js date library on npm — install, plugin model, version policy, and alternatives.
npm package date time library

tzutil & w32tm — Timezone and Windows Time

Read and set the system timezone with tzutil, then query, configure, and force-sync the Windows Time service with w32tm — including NTP peer configuration and Kerberos-clock-drift recovery.
tzutil w32tm windows cli sysadmin time ntp sync kerberos reference web-researched

Day.js — Tiny, immutable date library

Parse, format, manipulate, compare, and convert timezones for dates in JavaScript using Day.js — a 2 kB Moment-compatible alternative with a plugin-based architecture.
javascript dates time library tooling

datetime — Dates, Times, Timezones

Work with dates, times, and timezones in Python using the stdlib datetime module and zoneinfo. Covers aware vs naive datetimes, ISO-8601 parsing, strftime/strptime, timedelta arithmetic, and DST handling.
python stdlib time timezones parsing data