Posting hours and time zone
Sets the window of hours, in your saved time zone, that automatic and queued posts are allowed to go out in.
Settings → Posting schedule shows your Posting hours card. Press Edit and the editor opens inside the card; the Schedule tab's calendar shows the same hours and can edit them too.
The editor has a from time, an until time, a Time zone picker and Save. Leaving either time set to off means any time — no window is enforced on that side. Posting hours and daily limits are both measured in the time zone you pick here, which may be different from your device's own time zone.
Everything EverySqueeze posts for you goes out inside these hours, spread evenly across them. When you change your hours (or your time zone), the posts EverySqueeze planned for you are spread out again inside the new hours right away, in the same order.
The first post of the day isn't at the minute your hours open. Your hours are the window posts may go out in, not the time the first one goes. For each platform, EverySqueeze divides the hours still open that day into equal parts, one for each post that day, and puts each post somewhere in the middle of its own part (never on the hour or a quarter hour). So the first post usually goes out a little after your hours open, and the fewer posts a day you allow, the later it can be. With 5 posts a day and hours of 7am to 11pm, the first part runs from 7am to about 10am and its post lands between about 7:45am and 9:30am; with 1 post a day it can land anywhere from about 11am to 7pm. A day that has already started divides only the hours left, so a video that arrives at 2pm is spread over 2pm to your closing time (unless you chose As soon as possible under When new videos post: then a new video takes the first open time; see When new videos post). This is not your daily limit running out and no earlier post is holding it. To send a post at a time you pick, give it a time yourself (see Spacing between posts).
A post you scheduled for a set time keeps it. If that time falls outside your hours when it comes due (because you changed them), EverySqueeze does not hold it until the window opens and then send it in a bunch with others; it moves it to the next open slot, spread evenly with your other posts, and tells you on the Schedule, in the bell and with a phone notification: Moved from … to … because it was outside your posting hours.
When you schedule a post and choose Pick a time… (in Composer that choice sits on the video's card, right after you choose Schedule), the picker shows your posting hours and won't accept a time outside them: it says the time is outside your posting hours and names them, so pick a time inside them or change your hours first. On a computer you type the date and time (for example 10/3 and 9:30 pm) and the line under the fields reads back what it understood; on a phone you get your phone's own date and time picker. If a time outside your hours reaches the schedule another way, EverySqueeze moves it to the next time your hours open and tells you it did.
A time that only creeps later a few minutes at a time, while the reason on the post doesn't mention your posting hours, is not your posting hours: the post is waiting its turn, and changing your hours won't move it. See Why a post hasn't gone out for that, for how a held-for-hours post is shown, and Spacing between posts for the spacing rule that works alongside the window (a long "Space posts at least" needs wide enough hours to fit your posts per day).