When boiling eggs, it comes down to the temperature of the ice. If you refrigerate your eggs, it may take up to a minute longer for the egg to reach the desired doneness than indicated above.
On the other hand, the Heightyou are on will affect the cooking time. Water normally boils at 100 degrees Celsius, but this temperature applies at sea level. For example, if you are in a mountain hut in the Alps, the boiling temperature of the water will drop. The eggs then have to be cooked longer.
background: Water boils at 100 degrees Celsius only at normal pressure (at sea level). If the external pressure drops, the boiling point also drops. According to SWR Knowledge, the boiling temperature drops by around 1 degree Celsius for every 300 meters of altitude. With increasing altitude, the water molecules need less energy to escape into the air; To put it in everyday terms: water boils in the mountains at under 100 degrees Celsius.