Thanks Rich for your reply. But the version is FVP 9.

>According to the Hacker's Guide for VFP 7 (hope it's ok to quote it here)
>

>nFirstDayofWeek
> Omitted
> Use Sunday as the first day. This is for compatibility with older versions of FoxPro.
>

>
>
>>Sergey and Yuri
>>

>>? DOW(DATE(), SET("FDOW"))
>>

>>works perfect
>>But I read the help. I don't find DOW() function is not affected by SET FDOW
>>This is in my help
>>

>>Returns a numeric day-of-the-week value from a Date or DateTime expression.
>>
>>DOW(dExpression | tExpression [, nFirstDayOfWeek])
>>
>>Parameters
>>dExpression
>>Specifies the Date expression from which DOW( ) returns the day number.
>>
>>tExpression
>>Specifies the DateTime expression from which DOW( ) returns the day number.
>>
>>nFirstDayOfWeek
>>Specifies the first day of the week. nFirstDayOfWeek may be one of the following values.
>>
>>nFirstDayOfWeek  Description
>>0
>> DOW( ) uses whatever day is currently selected in the Week Starts On list box, which appears on the Regional Tab in the Options dialog box.
>>
>>1 Sunday. This is the default when nFirstDayOfWeek is omitted, and is the first day of the week used in earlier FoxPro versions.
>>2 Monday
>>3 Tuesday
>>4 Wednesday
>>5 Thursday
>>6 Friday
>>7 Saturday
>>

>>Yes [, nFirstDayOfWeek] is parameter but why I need to use this parameter while i have SET FDOW TO? or this is dummy SET ??? unusable may be
>>
>>>According to help, the DOW() function is not affected by SET FDOW. The following should work for you

>>>? DOW(DATE(), SET("FDOW"))
>>>

>>>
>>>>I read thread#1090152 and I try this code
>>>>

>>>>*** today is Wednesday
>>>>clear
>>>>SET FDOW TO
>>>>? DOW(DATE()) &&& result is 4  = true
>>>>SET FDOW TO 2 &&& Monday is the first day
>>>>? DOW(DATE()) &&& result is again 4. Why ? Today is Wednesday must by 3
>>>>

>>>>What do I wrong?
>>>>TIA