Just figured on my own. Enjoy.
<cfset ThisDay = 1>
<cfset weekDay = "">
<cfloop condition='ThisDay LTE Days'>
<cfset presentDay = CreateDate(year, month, thisday)>
<cfif DayOfWeek(presentDay) EQ '1' OR DayOfWeek(presentDay) EQ '7'>
<cfset weekDay = weekDay & " " & ThisDay">
</cfif>
<cfset ThisDay = ThisDay + 1>
</cfloop>
<cfoutput>#weekDay#</cfoutput>