date-fns
date-fns + @date-fns/tz
Purpose
Use this skill to implement, review, and refactor date/time code with modern date-fns and the native timezone package @date-fns/tz.
Version baseline (re-check when invoked)
date-fnslatest verified:4.1.0@date-fns/tzlatest verified:1.4.1- Re-check commands:
npm view date-fns versionnpm view @date-fns/tz versionnpm view date-fns dist-tags --jsonnpm view @date-fns/tz dist-tags --json
When to use
- Parsing, validating, formatting, comparing, and calculating dates.
More from wottpal/skills
jotai-nextjs
Expert workflow for Jotai state management with a Next.js focus, covering core APIs, SSR hydration, utilities, recipes, and current release migrations.
10use-the-index-luke
Postgres query and index optimization workflow based on use-the-index-luke principles. Use for EXPLAIN analysis, index design, predicate rewrites, joins, sorting, and pagination tuning.
8deep-research-firecrawl
Conducts citation-backed research using Firecrawl MCP search, scrape, map, crawl, and agent tools with selectable quick, standard, deep, and ultradeep modes. Use for multi-source comparisons, technical evaluations, market research, and high-stakes decision support.
8readme-agents-writer
Build and maintain unified README.md + AGENTS.md + CLAUDE.md docs where symlink-triplet policy is strict, and the canonical README remains an in-depth, high-signal agent instruction and engineering playbook.
6slack-web-api
Use when you need to read or act on Slack data via the Slack Web API (post messages, search, list channels, fetch channel history/threads, add/remove reactions). Provides a Bun+TypeScript CLI wrapper around @slack/web-api for deterministic queries and structured JSON output.
4worktree-handoff
Safely hand off the current source worktree state, including untracked files, onto a local target branch (default `develop`) without modifying the source worktree, using an alternate-index snapshot and target-side cherry-pick.
2