Yesterday / Today

[jack]

Scenario: I went to sleep at 11:00PM.

Which one do I use? I went to sleep at 11:00PM then it became 12:00am, so is it yesterday or today?
1. I had six hours of sleep yesterday.
2. I had six hours of sleep today.

How else can I say it?

Thanks.

[Casiopea]

Originally Posted by jack

Scenario: I went to sleep at 11:00PM.

Which one do I use? I went to sleep at 11:00PM then it became 12:00am, so is it yesterday or today?
1. I had six hours of sleep yesterday.
2. I had six hours of sleep today.

How else can I say it?

Thanks.

If you went to bed at 11:00 p.m. and woke up the next day at 5:00 a.m., then you had six hours sleep that night:

EX: I had six hours sleep last night.

that

and if you went to bed at 5 PM and woke up anytime the next day, wouldn't you say, "I had x hours of sleep yesterday."?

[RonBee]

Originally Posted by dodgerfan2002

that

and if you went to bed at 5 PM and woke up anytime the next day, wouldn't you say, "I had x hours of sleep yesterday."?

The common phrase (as Cas indicated) is I had six hours of sleep last night. That would especially true in the scenario you presented.

[Casiopea]

Originally Posted by dodgerfan2002

that

and if you went to bed at 5 PM and woke up anytime the next day, wouldn't you say, "I had x hours of sleep yesterday."?

That's a very good point, and speakers do in fact use 'yesterday' to refer to last night but in certain contexts only. As is, though, 'yesterday' generally expresses, not this day, not today, so it doesn't work well with the context jack provided. Here's an example situation where 'yesterday' does work:

EXAMPLE
Pat: Did you sleep last night?
Max: Yeah, I hit the hay at around 5 p.m.
Pat: Gee, you really had a great deal of sleep yesterday, didn't you?