School night bed times for Y8: what time?

[BackAche21]

My DD is about to go into year 8. She claims that her friends all stay up and text/facetime each other until 10.30pm and she is left out because her phone gets switched off at 7pm. We also have a 'no devices in bedrooms' rule. I've heard lots of kids are really tired at school and can't learn well because of staying online until late, so I want to be careful about changing to a later switch off time. But I think 7pm is probably too early and needs changing. What do you do?

My child is the same age. Phone parental app means child's phone is switched off 8.30 pm til 7.00am. bedtime at 9.30pm

All phones are downstairs in our house overnight - including mine. There will be children who have them all night long but as you can see, very few children have self control. Stick to your guns.

Up at 9.00 but she doesn,t always sleep to 10.00 recently she has been getting upat 6.00 of own accord..

It's not a matter of how late you can be awake but it's about how many hours of sleep your body needs. We use an useful chart for bedtime, at her age she needs at least 9 and a half hours of sleep, according to the time she wakes up 9pm could be a reasonable bedtime.
It's recommended to block the screen time at least one hour before bedtime to avoid over-excitement and bad sleep, so 8pm could be good, 7:30pm even better.
I follow strictly these measures for my three DDs using parental control apps that makes a wonderful job for that.

Useful chart for bedtime:
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Sorry, I thought it would be shown in the post

I have a Y8. At the moment he has crazy bedtimes, but we're going to start winding back down soon for when he gets back to school. I remove access to his pc at 9pm on a school night and his phone is removed too.
He can stay up till 10 if he wants to but he has nothing to do (read a book - noooooo!) He is a night owl and struggles to sleep earlier than 10pm. I get him up at 6.45am on a school day.

Electronics off at 7.30 for yr 6 & yr 8 here. Upstairs at 9, lights out by 9.30. There’s 18months gap but it’s just easier for them to go to bed at the same time unless either one is exhausted.
Bedtime is around 10.20 on Fridays and Saturdays, electronics off at 8.

Electronics plugged in to charge and out of bounds 8pm-8am in this house. And no phones in bedrooms either.

As for bedtime, all depends if she's struggling to wake up or not in the morning, is she drowsy in class? They are all different. My DD same age goes to sleep at about 10-10.30pm but reads for about an hour in bed to wind down, and wakes up at 7am. It seems enough for her.

Oooh, the old 'all my friends ...' argument. Don't fall for it. :)

Similar to others on here, the children's phones go 'off' about 7 or 8pm.

DD13 (yr9) can use the iPad for homework after that if necessary. I let her turn out her own light but I reckon she's not up later than about 9:30. She has to be out the door by about 7:30am so gets up at 6:20ish. She charges her phone in her room but since they don't work past about 8pm, there's not much point.

DD10 goes up about 8:30pm for storytime and independent reading if she wants. Again, lights are out by about 9:30 at latest. Likewise, she charges her phone wherever she wants but since it doesn't work between 8pm and 7am, it's not an issue.

Since their friends' parents have similar arrangements, they don't feel like they're missing much.

My kids aren't allowed screens after 7 pm either - but they are y3 and Y4. And I'm thinking of relaxing it for the y4.
Sleep charity recommend no screens for an hour before bed, so perhaps you could allow her device a bit later, if she's done what she needs to do for the day.