How to get mailchimp email data from HubSpot API

We currently use MS365, and each user has their email and calendars linked to HubSpot. My CRO wants to use Meeting Scheduler to book prospect meetings, but the one caveat

Hi all,  I am looking for a setting where we can say our week starts on Sunday instead of Monday. Does anyone know where to find this setting?

I have just signed up for Hubspot via the free trail – I am looking to buy if the service works for me.I thought Hubspot would allow me to manage