Added support for custom timestamp format #2808

Job	Run time
check-types (3.13)	37s
check-types (3.12)	38s
check-linting (3.9)	45s
check-types (3.10)	38s
check-types (3.9)	57s
check-types (3.11)	42s
check-linting (3.13)	27s
Unit Tests (Python 3.9, min deps)	3m 8s
check-linting (3.11)	43s
check-linting (3.14)	32s
check-linting (3.12)	30s
check-types (3.14)	45s
Unit Tests (Python 3.11, min deps)	3m 10s
Unit Tests (Python 3.11, default deps)	2m 52s
Unit Tests (Python 3.10, default deps)	2m 54s
check-linting (3.10)	32s
Unit Tests (Python 3.14, default deps)	18m 22s
Unit Tests (Python 3.10, min deps)	3m 6s
Unit Tests (Python 3.13, default deps)	2m 59s
Unit Tests + PyArrow (Python 3.9, min deps)	3m 34s
Unit Tests + PyArrow (Python 3.14, default deps)	11m 19s
Unit Tests + PyArrow (Python 3.13, default deps)	3m 27s
Unit Tests (Python 3.14, min deps)	18m 31s
Unit Tests + PyArrow (Python 3.10, default deps)	3m 20s
Unit Tests (Python 3.9, default deps)	2m 56s
Unit Tests + PyArrow (Python 3.10, min deps)	3m 38s
Unit Tests + PyArrow (Python 3.11, min deps)	3m 34s
Unit Tests (Python 3.12, default deps)	2m 52s
Unit Tests + PyArrow (Python 3.12, default deps)	11m 5s
Unit Tests + PyArrow (Python 3.11, default deps)	3m 15s
Unit Tests + PyArrow (Python 3.9, default deps)	3m 22s
Unit Tests + PyArrow (Python 3.14, min deps)	19m 4s
	2h 14m 14s

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