{{tag>Index Function Function_List Date_And_Time}}
====== DAY_NUMBER_IN_WEEK ======

===== Description ===== 
Returns day of week of the provided date (1 for Sunday, 2 for Monday etc)
===== Parameters ===== 
Attribute of the Date type or date constant or calculation producing date
===== Example ===== 
<code aim>IF DAY_NUMBER_IN_WEEK (Account.OpeningDate=1) THEN ... </code>