It's 25% higher on that day. For all that statistic tells you though, it might just be bringing forward a heart attack you would otherwise have had the following week.
This same numerical trick happened when the WHO classified red meat as a carcinogen "in the same category as" cigarettes, and it was stated that it increased your risk of some cancer by ~50% (or something), but the baseline risk is so low that it's a lot less dramatic than it sounds.