PHEP 3 Reminder: Q1 2026 Support Schedule

[PyHC]

Hello PyHC Community,

This is your quarterly reminder about which Python and dependency versions PyHC packages should support, per PHEP 3.

Adopt Support For (by end of Q1 2026)

The following should be supported by PyHC packages:

• ipython 9.5.0 to 9.6.0 (support by Feb 2026 and Mar 2026)
• xarray 2025.7.0 to 2025.9.0 (support by Jan 2026 and Mar 2026)
• zarr 3.1.0 (support by Jan 2026)

Can Drop Support For (as of Q1 2026)

PyHC packages may now drop support for:

• ipython 8.20.0 to 8.23.0 (released Jan 2024 and Mar 2024)
• pandas 2.2.0 (released Jan 2024)
• scikit-learn 1.4.0 (released Jan 2024)
• scipy 1.12.0 (released Jan 2024)
• xarray 2024.1.0 to 2024.3.0 (released Jan 2024 and Mar 2024)

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For more details, view the full support schedule and timeline or read the complete PHEP 3 specification.

Questions? Reply to this email or discuss on PyHC's Slack.

Best regards,
PyHC Tech Lead