tzdata
The IANA time zone database as a Python package, for zoneinfo where the OS has none (Windows).
Utilities PyPI Apache-2.0
How tzdata is used
tzdata is a dependency in 45 of the 6,208 public GitHub projects set up for AI coding agents that we scanned (2.8% of the 1,622 Python ones), #29 of 361 in utilities. Counting the projects our scan samples by dependency (Solana 2,661, Ethereum and EVM 1,496, 3D and games 2,818, agent frameworks and SDKs 10,983), it appears in 746; those are left out of every share on this page. The most used alternative in our scan is pytz (58 projects). Projects that use it most often also use packaging (73.3%), NumPy (71.1%), PyYAML (71.1%).
tzdata popularity over time
Gid Score 64: downloads 100, use in agent projects 80, GitHub stars 0, downloads trend 62 (each 0-100). How it is calculated.
Often used with tzdata
| packaging | 73.3% of tzdata projects · 50.0× more than average |
|---|---|
| NumPy | 71.1% of tzdata projects · 12.2× more than average |
| PyYAML | 71.1% of tzdata projects · 12.0× more than average |
| Requests | 71.1% of tzdata projects · 10.5× more than average |
| Pillow | 66.7% of tzdata projects · 17.4× more than average |
| urllib3 | 64.4% of tzdata projects · 41.7× more than average |
| charset-normalizer | 62.2% of tzdata projects · 57.7× more than average |
| Pydantic | 62.2% of tzdata projects · 7.2× more than average |
By coding agent
| Claude Code | 0.7% of projects set up for it |
|---|---|
| GitHub Copilot | 0.7% of projects set up for it |
| Cursor | 0.5% of projects set up for it |
| OpenClaw | 2.6% of projects set up for it |
| OpenAI Codex | 1.3% of projects set up for it |
Share of public repos configured for each agent that list tzdata as a dependency.
How tzdata is funded
Install
| Package | pip install tzdata |
|---|---|
| Main stacks | Python (40), Next.js (4), Other (1) |
| Example projects | XargonWan/Synthetic_Heart, ZhiweiChen-coder/OpenAshare, lb08111/nexora-ai-platform, siiway/NextBridge, Navinspire-ia/navin |
Alternatives to tzdata
Tools that do the same job, so a project picks one or the other. Add-ons and libraries used alongside tzdata are not listed here; they are in "Often used with".
| Tool | Gid Score | Used in agent projects | Downloads / wk | GitHub stars | License |
|---|---|---|---|---|---|
| pytz pypi Python timezone library with historical and modern timezone definitions. |
65 | 58 (3.6%) | 108M | 396 | MIT |
More in Utilities: clsx date-fns PyYAML uuid yaml js-yaml glob Lodash