Mass weddings have been held across Asia on Friday, to take advantage of the date of 11.11.11, which happens every 100 years.
11 November is already celebrated every year as "singles" day in China because the date contains four 1s.
This year is particularly auspicious, with the date comprising six 1s.
The BBC reports the number one can mean "bare sticks" in Chinese and refer to bachelors.
In Shanghai alone, almost 5000 couples have tied the knot.
In the eastern city of Nanjing, more than 3000 couples planned to marry.
This was 10 times the usual daily average, according to the Xinhua news agency.
In Hong Kong, the immigration department said 1017 couples had applied to get married.