Fully refactored:
- Direct drop-in replacements (subclasses) for standard Python `datetime` and Pandas `DatetimeIndex`.
- Cython-optimized for high-performance parsing, creation, and manipulation.
- Well-documented methods with type annotations.
- Flexible constructors accepting multiple input formats (strings, datetime objects, timestamps, etc.).
- Rich conversion options (ISO strings, ordinals, timestamps, and more).
- Comprehensive manipulation for precise datetime fields adjustments (years, quarters, months, days, time).
- Direct calendar information insights (e.g., days in month, leap years).
- Extended timezone-related capabilities.
- Supports adding or subtracting deltas, and compute deltas against datetime-like object(s).