Try -
Find xx where xx.timestampattribute = TIMESTAMP(1,12,2011,12,0)
For further details see the TIMESTAMP funtion in the how to user manual
Function:
TIMESTAMP
Description:
Returns the timestamp constant built from the given numbers
Parameters:
An integer constant indicating day (1-31), an integer constant indicating month (1-12), an integer constant indicating year, an integer constant indicating hours (0-23), an integer constant indicating minutes (0-59)
Example:
If TIMESTAMP (DAY_OF_MONTH (Account.OpeningDate), 4, 2004, 11, 0) = 07/04/2004 11:00 Then …