Calendar view
The Calendar page is a cross-campaign view of upcoming sends — every active campaign, every connected account, projected out day by day.
What it shows
For roughly the next 60 days, SubsiMail projects how many emails are scheduled to go out each day, based on every active campaign's enrolled contacts, their current step, and each campaign's own sending-days/hours/timezone settings. Use it to spot volume spikes before they happen — if several campaigns' schedules stack up on the same day, you'll see it here before it sends.
Vs. a campaign's own sending calendar
Don't confuse this with the sending-days/hours/timezone settings you configure on an individual campaign (see Creating a campaign) — that's input (when a given campaign is allowed to send), this page is output (a projection of what all of that adds up to, across everything running at once).