start_datetime: str = Field(
description=' The start datetime for the event in the following format: YYYY-MM-DDTHH:MM:SS±hh:mm,
where "T" separates the date and time components,
and the time zone offset is specified as ±hh:mm. For example: "2023-06-09T10:30:00+03:00" represents June 9th,
2023,
at 10:30 AM in a time zone with a positive offset of 3 hours from Coordinated Universal Time (UTC).'
)