The ASL words “all day” and “all night” are part of a special class in writing. Normally, one would write them with a digit, but because the location and motion are easily recognizable, the digit is completely dropped.
This special class is called the dropped indicators. Indicators are marks that summarize and show (or indicate) a signed word or concept. The “dropped” part refers to the unnecessary digit.
Here is the full “all day” word:
Night owls go “all night”:
Is it possible to combine the two? Yes!
Another way to write “all day and all night”:
Do the visuals help you see the words better? Let us know in the comments below!
To learn more about indicators, check out How to Write American Sign Language.