Datetime string in HQL

I am using Castle ActiveRecord for my application. My 开发者_运维知识库problem is how to use a datetime string in HQL like this (without using parameters):

"from Contact c where c.DayOfBirth = '5/3/1988'"

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Try using YYYY-MM-DD format:

from Contact c where c.DayOfBirth = '1988-05-03'