Date to datetime conversion in axapta

This code is Date to datetime conversion in axapta. Try this way.

 date fromDate ;  
 Timezone    timezone = DateTimeUtil::getUserPreferredTimeZone();  
 ;  
 fromDate=mkdate(1,mthofyr(str2date('1/9/2009',123)),Year(str2date('1/9/2009',123)));  
 abc.DateTime1>= datetobeginUtcDateTime(fromDate,timezone)