> For the complete documentation index, see [llms.txt](https://docs.dingdoong.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.dingdoong.io/terminology.md).

# Terminology

Date picking is the fundamental of our app, so naturally it would be good if we explain the terminology and talk about how things work.

**Number of preparation day**: Amount of time in day needed to prepare. This is the idle time from the point of ordering to the first day of date/time selection

**Delivery date range**: The range of day customers can select their order date and time.

**Blackout date**: holiday period when you don't work. The app will disable selected dates and push the remaining preparation day(s)/delivery day(s) forward. 

**Working day**: is defined as the day(s) within the week when you can fulfill customers' orders. You can to set up all 7 days of the week or selected ones only. 

By default, **non-working day will be counted toward your prep day.** If you don't want to consider non-working day as your prep day, go to **General Settings** and turn on **"Do not include non-working day in prep day".**