query any date before current month

[camp1310]

Hi, I thought this might have been an easy one but i cant find any references to it.
I am trying to query any date before current month. My data is employee start dates, thus my end aim is to pick up all employees at end of last month.
Thanks

 

[Galaxiom]

WHERE [datefield] < DateSerial(Year(Date()), Month(Date()), 1)