You can find the day of the week in Excel using two main methods:

1. WEEKDAY Function:

The WEEKDAY function is a more direct approach to get the numerical representation of the day of the week (1-7, where 1 is Sunday and 7 is Saturday).

Syntax: `=WEEKDAY(date_serial_number [, return_type])`

- date_serial_number: This is a number representing a date. You can enter a date directly (e.g., "08/07/2024") or use a cell reference containing a date value.
- return_type (optional): This argument specifies how you want the day of the week displayed. By default (omitting this argument), it returns a number (1-7). You can use 2 to get a three-letter abbreviation (Mon-Sun) or 3 to get the full day name (Monday-Sunday).

Example:

- To find the day of the week for July 8th, 2024 in cell B1 containing the date: `=WEEKDAY(B1)` (returns 1 for Monday)
- To get the three-letter abbreviation for the same date: `=WEEKDAY(B1, 2)` (returns "Mon")

2. TEXT Function with Date Formatting Codes:

This method uses the TEXT function to format an existing date into a text representation showing the day of the week.

Syntax: `=TEXT(date_serial_number, "dddd")` (for full day name) or `=TEXT(date_serial_number, "ddd")` (for three-letter abbreviation)

Example:

- To display the full day name for the date in cell B1: `=TEXT(B1, "dddd")` (returns "Monday")
- To display the three-letter abbreviation: `=TEXT(B1, "ddd")` (returns "Mon")

Both methods achieve the same goal of finding the day of the week. The WEEKDAY function is more efficient for calculations, while the TEXT function with formatting codes provides a visual representation. Choose the method that best suits your needs.