CI/CD

Add Christmas Island holidays #8225

Job	Run time
Run pre-commit	32s
CodeQL	1m 34s
Test Python 3.10 on ubuntu-latest	1m 22s
Test Python 3.12 on macos-latest	46s
Test Python 3.9 on ubuntu-latest	1m 17s
Test Python 3.11 on macos-latest	46s
Test Python 3.13 on macos-latest	1m 12s
Test Python 3.10 on macos-latest	1m 6s
Test Python 3.9 on macos-latest	1m 6s
Test Python 3.12 on ubuntu-latest	1m 27s
Test Python 3.11 on ubuntu-latest	1m 14s
Test Python 3.12 on windows-latest	2m 48s
Test Python 3.13 on ubuntu-latest	1m 38s
Test Python 3.10 on windows-latest	2m 37s
Test Python 3.11 on windows-latest	3m 10s
Test Python 3.13 on windows-latest	3m 8s
Test Python 3.9 on windows-latest	2m 37s
Test docs build	25s
Build distribution	21s
Test build on macos-latest	48s
Test build on windows-latest	4m 8s
Test build on ubuntu-latest	1m 0s
Create SHA1 checksums and Sigstore signatures	0s
Publish generated artifacts	0s
Update GitHub release with SBOM and signed artifacts	0s
	35m 2s

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