Work on weekend?!! Advice needed

step 1: Give him the updated timeline for the task assigned. step 2: Let him know you'll pick this up first on Monday

If he doesn't agrees Ask him to email you the details for WORKING ON SATURDAY

This idea may work most of the time.
Do keep a part of completed work(code) in reserve which manager don't know. Always have enough reserve so that if manager asks suddenly, when you are thinking of relaxing a bit, you tell him it will take 'x' time to do and give the completed work from reserve. Do some part of future work, store it in reserve when you have time. Keep this cycle so that you don't feel any pressure.
Note: This is only for these type of people.

UPDATE : So manager called me and bitched about how he was working late daily for past week for no apparent reason .
(Idk why he was working daily late because all the work was going smooth and i saw no task , so i deduce he is a gand chaatu who was on call with US counter part. ) Tldr: manager said " SAARI RAAT MAI SOYA NAHI , AB MUJHE SONE DO".

Update 2.0- All the task are done as i expected and i am logging off 30 mins early too. With this rant post i wanted to show how some managers who just want to show their power and supremacy do such tactics . They dont know that such things are the ones which will come back to them one day .
Idk what happens to me in future but i hate overtime unless its ground breaking task . So i will always stand up for this and will deny any unnecessary show of power by any fktard.
These dumb single braincell managers think shouting on devs will get their task done faster but they dont know that its only temp and so is their position.
Anyway off to enjoy my weekend Thanks for listening to my dear rant.

Get this on weekend : carpal tunnel syndrome.

Very relatable post, you should not tell about current work status rather T-1 or T-2 status, so that I request for comp for weekend and worked on the same? Lol.

Either he gets the impression that you don't work enough or you're estimating your tasks poorly.

Many things that I see here, this is my suggestion.

1. How do you want to spend your time over the weekend, it could anything or absolutely nothing, it’s your time no one should debate that. How does this help in your profession setting, it subconsciously helps you to speak to your colleagues and manager that what’s happening over the weekend. This would help you set expectations to your manager and colleagues and overtime it’ll help your manager to realise that you got things to do. It’s the slowest non-confrontational approach.
2. Track your time over the weekends on things that could be avoided and what caused the spillover. It could be to do with many things and this would help you in observing a pattern and that would eventually help you to have conversations with say your cross functional dependent teams and you can influence their actions without authority to make sure that everyone has their weekends to themselves. This would eventually turn out helpful for your managers because if things don’t spill over and if the projects are going as planned, then manager might not worry about things that needs to be released . This also gives you a skill to manage people and projects effectively and in future it’ll help you be a better manager when you lead teams.
3. With point 2, you can have a informal conversation with with your manager about how his weekend or her weekend as be, and get to know how your manager generally works by bringing him into the conversation about himself, will reduce any sort of invisible hierarchy or authority, and basically builds empathy on both ends, this conversation can be formalised where you can speak to your manager saying hey I have done some observation and tracking over the things that I walked over the weekend and this is a while thinking to manage projects efficient . What do she/he/they think?
4. In case all that you have done hasn’t led to any progress - find a new jobs.
   PS: I ran out text space to write more 😅

You guys don't work all day on weekends?? .jpg

I you are utilising your time and learning something new by doing some official task given then please do, it will you to grow

And if you do not find any, it's ME time