#1MinuteTip Do you know which day will be considered as the first day of the week in Salesforce? If you are using filters on dates like ‘THIS WEEK” or “NEXT WEEK”, what is the boundary of that week? Is it Sunday to Saturday, Monday to Sunday or something else? Actually, it is locale settings in Salesforce that determines when a week starts and when it ends. For example, When the Locale is US English, a week runs Sunday to Saturday, whereas with UK English, a week spans Monday to Sunday. Please click here to see the definition of the week as per your locale.