The ad that you intend to book is a Display Advertisement and there is no special offer day as such for booking a Display ad.  You can visit the TOI Display Ad Booking page and select the edition of the newspaper from here. This will take you to the page where you have to specify the size of your ad and the ad position. In the Custom Size section, you just have to specify the size and this will accordingly display the estimated cost for the selected ad size and position.

The following steps to confirm your booking are the compose ad step, select dates and payment options. Please try to book the ad two days prior to the day of ad release and also ensure that you clear the payment for the same.