Which day is indicated by the letter "M" in the proofing notation?

The letter "M" in proofing notation conventionally stands for Monday. In various contexts, especially in scheduling or operational planning within the food and service industry, days of the week are often abbreviated to a single letter for quick reference. Monday is typically the first day of the work week in many cultures, making it the logical choice for this designation.

Understanding this notation is crucial for efficient communication, particularly in environments where time-sensitive decisions must be made quickly, such as inventory management or staffing schedules. Knowing that "M" corresponds to Monday allows team members to align their tasks and responsibilities effectively around the start of the week.

Other options like March, Midweek, and May have different letters that are either not specific to day designations or have distinct first letters, which reinforces the clarity provided when using "M" for Monday in the proofing notation.