Optimize Kst day lookup process

[arkid15r]

Replace while loops with dateutil logic:

The list of code parts to optimize:

• https://github.com/dr-prodigy/python-holidays/blob/a772f79327a64639ec1fe89c79165d585c3a9b3d/holidays/countries/angola.py#L63
• https://github.com/dr-prodigy/python-holidays/blob/a772f79327a64639ec1fe89c79165d585c3a9b3d/holidays/countries/botswana.py#L57
• https://github.com/dr-prodigy/python-holidays/blob/a772f79327a64639ec1fe89c79165d585c3a9b3d/holidays/countries/mozambique.py#L38
• https://github.com/dr-prodigy/python-holidays/blob/a772f79327a64639ec1fe89c79165d585c3a9b3d/holidays/countries/south_africa.py#L138
• https://github.com/dr-prodigy/python-holidays/blob/a772f79327a64639ec1fe89c79165d585c3a9b3d/holidays/countries/south_africa.py#L158
• https://github.com/dr-prodigy/python-holidays/blob/a772f79327a64639ec1fe89c79165d585c3a9b3d/holidays/countries/south_africa.py#L169
• https://github.com/dr-prodigy/python-holidays/blob/a772f79327a64639ec1fe89c79165d585c3a9b3d/holidays/countries/south_africa.py#L176
• https://github.com/dr-prodigy/python-holidays/blob/a772f79327a64639ec1fe89c79165d585c3a9b3d/holidays/countries/zimbabwe.py#L56
• https://github.com/dr-prodigy/python-holidays/blob/a772f79327a64639ec1fe89c79165d585c3a9b3d/holidays/countries/zimbabwe.py#L67

[arkid15r]

Hey @KJhellico, would you like to look into this? For some reason I thought you may be interested :)

[KJhellico]

Definitely! 😋 I will look into it

[dr-prodigy]

770 merged right now.. thank you both! 👍