Regina celebrates New Year in the beginning, and when she calls Surya in the call center for phone repair, the date is mentioned as 27/12/2007.
In the introduction scene of Nazriya Nazim, she is shown dancing to a song 'Ringa Ringa' from a Telugu movie Arya 2. According to the story, Nazriya's part happens in 2007. But Arya 2 got released only in 2009.
Santhanam says, "In 2007 we met Kiirthana," and she starts dancing to the song "Ringa Ringa" which was composed in 2008.