[Coder's Calendar] Firefox and Chrome extension for Competitive Programming


Hi all,
We all know how difficult it is to be aware of the different coding competitions taking place on various websites,so I’ve made an add-on(extension) both in chrome and firefox to make this task easy.

  • Updates from Codechef,HackerEarth,Hackerrank,Topcoder,Codeforces
  • Add to google calendar feature.

Star the project in Github to show your support.

Coder’s Calendar is available for download at:

Found any bugs? Have any suggestions to make this project better? Know any other cool coding sites?
Do comment about it.
Happy Coding!

Preferences menu:


Hi, your works are simple superb (y)

Thank You!

Awesome job.Thank you.

One suggestion, you may add a hover over for each of the sites. That would surely help the rookies :slight_smile:

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really nice job. Thanks for it really needed it

like hover and show the name of the website?

Thank you!

@nishant_v Yes. That’s exactly what I’m talking about. :slight_smile:

OK.I’ll add it in the next update (y).

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Hi everyone,

Here is one more extension for chrome for coding competition datesand timings which is very useful and it is really awesome


Would you please add Option to select time zones, and change the default timezone to the one OS set to, instead of Indian timezone ?

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I’m working on it.

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Excellent work!!

Some good extension here in the thread, Thanks for sharing.

Thank you.If you did like the extension,I request you to rate/review it.

Great job.Needed one like this.

Thank you.I would be glad if you could rate/review it in the corresponding webstore.

@annaqeeb : I believe I’ve fixed it.Please update the extension to see the change.Do let me know if there is any issue.

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there is already an extension for this purpose on chrome webstore…and it supports much more sites than this extension…click here to download it…

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