Is there anyway to set the refresh frequency based on date and time? Can we set the initial sync on customised date& time and has to trigger only once?

Hey @Naveen Sai Patnana we have an issue created for this https://github.com/airbytehq/airbyte/issues/2170 this is more around supporting cron strings as a schedule method.

Can we set the initial sync on old basis and has to trigger only once?

I think for this 1. You can create a connection and set the sync type to manual 2. And you can use this https://airbyte-public-api-docs.s3.us-east-2.amazonaws.com/rapidoc-api-docs.html#post-/v1/connections/sync API to initiate a manual sync.