New answers tagged notifications
You can set a specific time for a reminder: mouse over the entry in Reminders and a circled "i" for "Information" will appear, upon which you should click. Then select the checkmark box, "Remind me: On a Day," and fill in the date and time for the reminder. The Reminders functionality in OSX and iOS is minimal; Apple seems to have wanted to include a ...
In the Notification Centre settings, you can have an app only play sounds but not show any notifications, or show anything on the lock screen. Take a look through the list for entries that only show Sound as the notification options, and turn off the sound option.
You can enable Do Not Disturb from the top of Notification Center. Open Notification Center using the button on the menu bar or swiping in from the right side of the trackpad with two fingers, then scroll up and turn the switch on.
This is currently not possible in Mail's preferences. You can provide feedback to Apple here: http://www.apple.com/feedback/mail.html
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