In North America, South America and Middle East, Sunday is traditionally considered the first day of the week. This is often reflected in calendars, where Sunday is the first column.

In many parts of Europe, much of Asia, and according to the ISO 8601 standard, Monday is considered the first day of the week. This standard is widely adopted for business and international communication.

Most calendars let you choose do you like Sunday or Monday as your first day of the week. This is not the case of Drag App where only Sunday is option.

This is not a big development but adds lots to the experience.