Passage: On 10 February 1972, Ras al-Khaimah, under the leadership of Sheikh Saqr bin Mohammad al-Qasimi, joined the United Arab Emirates.

Question: Based on this passage, when did ras al khaima join the emirates?
Steam of consciousness below:
This is the relevant information: On 10 February 1972, Ras al-Khaimah, under the leadership of Sheikh Saqr bin Mohammad al-Qasimi, joined the United Arab Emirates.
So, the answer is 10 February 1972.