One click and be ready to go up on stage and shine! - https://zehfernandes.github.io/pliim/

pliim-turnOff.scpt

# Turn on Notifications
do shell script "defaults -currentHost write com.apple.notificationcenterui doNotDisturb -bool FALSE; defaults -currentHost delete com.apple.notificationcenterui doNotDisturbDate; osascript -e 'quit application \"NotificationCenter\" ' && killall usernoted" -- this set  'Do not disturb' to false in the pref

# Show Desktop
do shell script "defaults write com.apple.finder CreateDesktop -bool true; killall Finder"

# Show all windows
tell application "System Events"
	set visible of (every process) to true
end tell

pliim-turnOn.scpt

# Disable Notifications
set tDate to do shell script "date -u \"+%Y-%m-%dT%TZ\"" --  the current date in UTC time. --> "2016-04-04T17:03:04Z"
do shell script "defaults -currentHost write com.apple.notificationcenterui doNotDisturb -bool TRUE; defaults -currentHost write com.apple.notificationcenterui doNotDisturbDate -date " & tDate & "; osascript -e 'quit application \"NotificationCenter\" ' && killall usernoted" --this  set 'Do not disturb'  to true in the pref

# Hide Desktop
do shell script "defaults write com.apple.finder CreateDesktop -bool false; killall Finder"

# Hide all windows
tell application "System Events"
    set visible of every process whose visible is true and name is not "Sketch" to false
    set the collapsed of windows to true
end tell