basically I want to validate whether or not a text box is a certain day of the week.
do any of the dataannotations cover this or is this something i need to run under a for loop somewhere else.
If the latter is the case do I carry this in the model.designer.cs or within the controller?
You could use the regular expression data annotation + mvc’s built in validation.
http://msdn.microsoft.com/en-us/library/system.componentmodel.dataannotations.regularexpressionattribute.aspx#Y2063