This is good, but keep in mind that a formula that uses some VFP functions is usual MUCH faster than a UDF using the same VFP functions.

Vlad

>Hiya Dragan,
>My contribution...
>

*!***********************************************
>*!
>*!       Function: EOMTH
>*!
>*!***********************************************
>FUNCTION EOMth
>PARAMETER dt
>RETURN GOMONTH(BOMth(m.dt), 1) - 1
>
>*!***********************************************
>*!
>*!       Function: BOMTH
>*!
>*!***********************************************
>FUNCTION BOMth
>PARAMETER dt
>RETURN m.dt - DAY(m.dt) + 1
>

>But I gotta admit I haven't been following the whole thread