How long is milk good in the fridge?

"it is actually best to store fresh milk in the refrigerator at 4°C and consume it within three days after opening."

https://www.sfa.gov.sg/food-for-thought/article/detail/how-long-can-you-keep-fresh-milk-once-it-s-opened

"there's even a specific location in your fridge where you should be keeping your milk — and it's not on the door's shelves...milk should be stored at 38° to 40°F in the same container it came in, and far away from the door."

https://www.businessinsider.com/when-to-throw-out-your-milk-2018-1

"Once opened, all milk can last for 4-7 days after the milk expiration date."

https://www.streetsmartkitchen.com/how-long-does-milk-last/