Like many others, I wake in the night - almost always between 2:30 and 4:00.
This Interrupted Sleep - as it's called - is a form of polyphasic sleep, and many scientists believe that it's a good thing - it aids in relieving stress apparently.
In times past, it was quite common for people to wake up at some point and get out of bed, socialising with other family members, perhaps having some food and drink, and then going back to bed for what they called their 'second sleep'.
After many years of shift work, it took me several years to get into sleeping every night at regular times.
As to waking up in the night it varies but my most regular time is almost on the dot at 3am. I don't always need a pee but have one anyway because I know if I don't I'll wake up at about 5am and then I won't be able to get back to sleep again, and my little furry alarm will be wanting his breakfast at about 6.30 anyway.
Just wonder how much my next gas bill is going to be.
My last gas bill was £445 for a 90 day period ... due to a 'perfect storm' of very low temperatures outside, a vacant property directly below me, a central heating system in need of repair and a healthy fear of the aftermath of frozen pipes.
On topic, I'm on automatic pilot to the loo at 2.30am then at 5.10am when my first alarm goes off. It's then back to bed until my second alarm goes off at 7.45am when normal service is resumed.