Convert an aware datetime to another offset.
Python: Use astimezone for conversion; replacing tzinfo alone does not convert an instant.
from datetime import datetime, timezone, timedelta
value = datetime(2026, 1, 1, 12, tzinfo=timezone.utc)
print(value.astimezone(timezone(timedelta(hours=-5))).isoformat())Expected output EXAMPLE
2026-01-01T07:00:00-05:00
Details
Save as snippet.py and run python3 snippet.py. Uses the Python standard library. Use astimezone for conversion; replacing tzinfo alone does not convert an instant.
A fixed offset has no daylight-saving rules. Use zoneinfo for regional time zones.
Tested on Ubuntu 24.04.5 LTS · · Python 3.12.3 · python3 3.12.3-0ubuntu2.1
Test inputs, results and environment
The exact published code ran in a dedicated Linux test container with prepared inputs. Unprivileged snippet process, external networking disabled, read-only root filesystem, and a fresh temporary working directory. Fixtures and output records are isolated from the application database. Testing covers this example and its stated checks, not every input, operating system, or runtime version. The Linux container shares its host's kernel; this is not a native Windows test.
- Architecture / host kernel
- x86_64 / 6.18.54.1-microsoft-standard-WSL2
- Snippet identity / locale
- uid=65534, gid=65534 (unprivileged) / C.UTF-8
- Interpreter invocation
python3 -c <published code>- Container image ID
sha256:32dc2d998158b6554c99b73b533f423696a0f3e31e8cbea9db10b5eee9a2fadd- Code SHA-256
c4ef588cc4e769ee295f49698887f9ba9e5cf03ee9da8bb67eed141204f0fea7- Dependencies
- python3 3.12.3-0ubuntu2.1
Test input setup
These are the prepared inputs used by the test harness. See Details above for the prerequisites and how to run this example.
# No input files required.
Observed standard output
2026-01-01T07:00:00-05:00
Exit code: 0. Standard error: empty. Validation: Exact stdout comparison. System-dependent values above are one recorded run.