Because you'd get up on Monday and then book a table for after work on Tuesday. The ambiguity of defining "today" would be problematic. Now sure people who wor

Because you'd get up on Monday and then book a table for after work on Tuesday. The ambiguity of defining "today" would be problematic. Now sure people who work night shifts have that, but it's a small number of people and a small number of services that are open 24/7.