The most stressful days for all Americans this yearPatel says “it’s interesting” so many holidays and celebration days are at the very top of the list for most stressful. Three of the top five most stressful days for American Oura ring users were major holidays. NY Post 5 An example of a “stressful” day of Oura ring readings. Also of note: Most of the top 20 (75%) of the most stressful days in America were Saturdays. “Mondays may feel psychologically stressful, but the biggest physiological stress days may be the ones tied to disrupted routines.”