How is 5:30 formally written on a reception/invite card?

"Thirty minutes past five"





Or even more formally,





"The fifth hour and thirty minutes"
How is 5:30 formally written on a reception/invite card?
you can write it out:








please help us celebrate


at five thirty in the evening
Reply:Five-thirty
Reply:half past 5





5:30 pm in cursive writing





five thirty pm
Reply:5:30? DUHHHHHHHHHHHHHHH
Reply:half past five
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