thirty, 30

thirty-two; 32

30th day of the month

thirty days, thirtieth [date]

thirty-five; 35

thirty-four; 34

in the 30's

did not do what one should have done (lit., "thank the god of the kitchen on new year's eve--what should be done is undone")

31st day of the month

thirty-first [date]

for the past thirty years

thirty-six; 36

thirty-seven; 37

thirty-one; 31

thirtieth

thirty-eight; 38

31st day of the month

thirty one days, thirty-first [date]

thirty-nine; 39

(proverb) saying someone needs to dissipate/pay out the price before getting what they need/want

July 30

July 30th

thirty days

Famine events, localized events of voluntary fasting for 30 or 40 hours depending on the region to raise money and awareness for world hunger.

thirty-three; 33

thirty-three