Mostly a south Indian festival, Vishu is the dawn of a new astronomical year, and the day marks the first day of the Malayalam month of Medam that corresponds with April in the Gregorian calendar.
They will issue a refund and depending on the method of refund, this should be completed within 28 days. You will be asked to return all documentation regarding the gap insurance you have cancelled and the cover will cease at this point.
Now, you want to know when to expect your refund. Generally, if you e-file and use direct deposit, the IRS estimates that you should receive your federal refund between 8 and 14 days after they accept your return (i.e. the IRS does not send you a notification requesting additional information or an audit notice).