Thirteen
Definition 1 of 2
Pro Tip 1/3
Superstition Link
Thirteen is considered unlucky in some cultures, especially when paired with Friday. Many buildings skip the thirteenth floor due to superstition.
Pro Tip 2/3
Counting Accuracy
Pay attention to 'teen' sound at the end; it can be confused with 'thirty' when not enunciated clearly. Please bring me thirteen (not thirty) chairs for the guests.
Pro Tip 3/3
Not Actual Time
Avoid saying 'thirteen o'clock'; it is not standard as the 24-hour clock resets after twelve. Instead of 'thirteen o'clock', say 'one o'clock PM' or '13:00'.