CFLib.org – Common Function Library Project

Description:
Returns the date for the first day of the week for a passed in date object. Assumes Sunday as the first day of the week.

Return Values:
Returns a date.

Example:

<cfoutput>#firstDayOfWeek(now())#</cfoutput>

Parameters:

Full UDF Source:

/**
 * Analogous to firstDayOfMonth() function.
 * v1.0 by Pete Ruckelshaus
 * v2.0 by Randy Johnson (made the date argument optional)
 * v2.1 by Adam Cameron (simplified logic)
 * 
 * @param date      Date object used to figure out week. (Optional)
 * @return Returns a date. 
 * @author Pete Ruckelshaus (pruckelshaus@yahoo.com) 
 * @version 2.1, March 8, 2014 
 */
date function firstDayOfWeek(date date=now()){
    return dateAdd("d", -(dayOfWeek(date)-1), date);
}