01 January 0001
The time setting covers a 24h period which can be set to cover an overnight time period. For example, if you wanted to set 9.00pm till 7.00am the next morning it would be 21:00 – 07:00 where the 07:00 will be labelled Next Day.
You can then go into the repeat menu and you can select which days you want this to cover.
Under the Do-not-disturb device select the devices you want the do not disturb to cover or use the select all button to select all.