ENH: Add HalfYear offsets #22012

Job	Run time
Pyodide build	23m 3s
Linux-32-bit	18m 6s
Linux-Musl	16m 29s
macos-13 actions-310.yaml	28m 51s
macos-14 actions-310.yaml	18m 31s
macos-13 actions-312.yaml	24m 33s
macos-14 actions-311.yaml	17m 42s
macos-13 actions-311.yaml	29m 7s
macos-14 actions-312.yaml	21m 5s
windows-latest actions-311.yaml	33m 16s
windows-latest actions-310.yaml	34m 15s
windows-latest actions-312.yaml	47m 16s
python-dev (macOS-13)	20m 6s
python-dev (macOS-14)	13m 10s
python-dev (ubuntu-22.04)	20m 58s
python-dev (windows-latest)	22m 4s
python-freethreading	22m 47s
Minimum Versions	23m 56s
Future infer strings (without pyarrow)	39m 58s
Locale: zh_CN	23m 40s
Locale: it_IT	24m 4s
Downstream Compat	5m 55s
Numpy Dev	17m 7s
Pyarrow Nightly	20m 46s
Future infer strings	49m 49s
Pypy	1m 29s
ubuntu-22.04 actions-310.yaml	48m 59s
ubuntu-22.04 actions-311.yaml	44m 18s
ubuntu-22.04 actions-312.yaml	48m 41s
ubuntu-24.04-arm actions-311.yaml	39m 1s
ubuntu-24.04-arm actions-312.yaml	47m 21s
ubuntu-24.04-arm actions-310.yaml	41m 54s
	14h 48m 17s

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