What is the date? (used to request the current date)

(idiomatic) Used to express disappointment about someone's uncharacteristic or abnormal past actions.

(idiomatic, US) As an interrogatory, indicative of a nonchalant attitude towards potential criticism, not caring about what other people think, confident and self-possessed.

(idiomatic, humorous) Used to express surprise about someone's uncharacteristic or wacky, offbeat past actions.

Used to ask what the interlocutor is currently doing.

(dated) whatchamacallit

(dated) Synonym of know what is what

(rhetorical question, somewhat hostile) Expresses discomfort because the interlocutor is looking at something; usually, this is said when the interlocutor has been staring at the speaker.

(MLE, MTE, slang) what's up, what's happening (a greeting)

(emphatic) Used to express that the thing in question is an ideal example.