Big Billion Day 2025 Date. Flipkart's big billion days 2025 sale could start on september 26 for plus members, as per a leaked banner shared by tipster abhishek yadav on x. The big billion days sale will kick off on september 26th at midnight for flipkart plus members while regular.

The big billion days sale is the biggest sale event of the year on flipkart. All you need to know.