# 'YYYY' = [0000-9999]
# 'MM' = [01-12]
# 'DD' = [01-31]
# 'T': ISO 8601-1:2019 introduced
# 'hh' = [00-23]
# 'mm' = [00-59]
# 'ss' = [00-59], 60 for denoting an added leap second
# midnight = "00:00" (ISO 8601-1:2019)
# ISO 8601
YYYY-MM-DDThh:mm:ss.sss # eg. 2022-01-01T12:00:00.123
YYYY-MM-DDThh:mm:ss.sssZ # eg. 2022-01-01T12:00:00.123Z
YYYY-MM-DDThh:mm:ss.sss+hh:mm # eg. 2022-01-01T12:00:00.123+08:00
YYYY-MM-DD hh:mm:ss.sss # eg. 2022-01-01 12:00:00.123
YYYY-MM-DD hh:mm:ss.sssZ # eg. 2022-01-01 12:00:00.123Z
YYYY-MM-DD hh:mm:ss.sss+hh:mm # eg. 2022-01-01 12:00:00.123+08:00