to be annoyed at these comments from my colleagues ?

[BadSpeakingSkills]

Each day at the end of the day, I have to leave at 5.00pm, on the dot and if I stay even 5 mins late it will have an impact on my travel time by the time I get to the CM's to collect my DC from there. It's tight but it's doable.

Many many times I get the odd sarky comment of 'Ooo always leaves dead on time !' 'We'd never expect YOU to stay late because of your children.' My manager is awkward at times as well as he will often call me into a meeting and want to know the postion of X task and where we are at about 5 minutes before I go and it's Never a 5 min conversation and he gets arsey with me if I say a quick version of events. I have tried in the past of approaching at 4 - 4.30 to arrange a more thorough meeting but he'll always brush me off of 'Later, I'll see you before the end of the day.'

If I need to do extra work I will do it in my lunch time and not take the time back, I don't shirk my extra responsibilities and just cannot stay past 5.

AIBU to be annoyed with these comments ?

YANBU. People just need to keep their traps shut and get on with their own work.

I've been there, I know how you feel!

I would tell your boss, well you know I have to leave at 5 on the dot, and leave it at that. That way you have made your position clear and any failure to deliver the info on time is your boss' responsibility. Not your problem.

I had a boss like that when DD was tiny and I had to do the mad dash to the CM. She was horrible to me.

I saw her years later and she had twin toddlers and a newborn (and looked knackered ). She apologised wholeheartedly for how she had treated me and how difficult she made life for me.

Doesn't help you much I'm sorry. Just ignore and carry on.

YANBU it's really shitty of your colleagues. IME Mums work their socks off to get finished in time to collect children and waste far less time during the day.
I'd have a chat with your manager and tell him that you have other obligations outside work, keeping you behind is a form of bullying.

I have this too at work from younger child free colleagues. I ignore it because what else can I do.

Most of the time I think it's not meant nastily but what irks me is that other senior people may pick up on it and assume I am a clock-watcher.

Its a cross you have to bear as a working parent. Until workplace structures and attitudes change radically, workplaces will always be like this.

Just repeat "stop commenting on me leaving at 5. I have to or I can't get to childminders in time
I do extra work at lunchtime if needed so stop commenting negatively please".

I do the same so have total sympathy - commenting is just arseholeish.

It's this sort of low level prejudice and undermining of mothers / parents (but let's face it 9/10 it is mothers) that creates inequality in the workplace.

Having said that, I had DD quite late so was the childless one for many years and I did feel that I had to pick up slack for some colleagues with kids. It wasn't so much about them leaving early as a more general workload thing. I was also always the one who got lumped with the overnight or late travel gigs which wore thin after a while.

I remember jokingly calling someone a part-timer because it was a couple of days between me needing to speak to her and spotting her in passing. Turned out she had in fact gone part-time since having her baby...

You have my sympathy, OP, it's rude!
I am a teacher and sometimes I go at 3:45 on the dot as I do tutoring 2 evenings a week. This gets similar, stupid comments from some people. However what they don't realise is that I am at school at 6:40am every day without fail, getting stuff done.
YANBU

I used to leave earlier than a lot of my colleagues at one job because I'd arranged a time shift with my manager. I got similar comments all the time. In the end I snappily turned around and told them that considering they never made it into the office for their start time they shouldn't be commenting on people who do run to time. Shut them up mostly. When it cropped up again I'd make a point of commenting on the time they made it in the next morning for a while. Childish I know.

Oh and I know the ballsack boss trick. One of my bosses used to pull this on me all the time especially on Fridays when she wasn't in the office (she used to call, and go nuts if I didn't answer - which sometimes I didn't do as I was on the loo). In the end OH used to ring me at about 5 mins past end time, so I could just go 'oh, gotta run - OH is waiting downstairs for me'. Not that he was, but she didn't know!

If you are getting all your work done and no one else is picking up the slack for you then I can't see the problem.

Save all your anger up for a day when you are feeling particularly hormonal and let rip, I bet they won't do it again!