[Marius Gedminas] > ... > BTW, regarding INTERVALs: PostgreSQL allows one to specify a number of > months in an interval, and expressions like date 'YYYY-MM-DD' + interval > '1 month' return the same DD on the next month. What's the value of 2000-01-31 + 1 month ? The last day of February? If so, is (2000-01-31 + 1 month) - 1 month then 2000-01-29?