File Extension Library


.C2K File Extension

  • Developer by: Microsoft Corporation
  • Category: Various data Files

What is an .C2K file?

.C2K file extension is created by Microsoft Corporation. .C2K has been classified as Various data Files.

.C2K is Microsoft Project holidays data

The c2k file extension is associated with the Microsoft Project, a planning tool available for various platforms and as on-line service.

The c2k file contains information about holidays in XML file format.


How to open:

Use Microsoft Project to work with *.c2k files.

How to convert:

Microsoft Project may be capable to export *.c2k files to other formats.

How to Open .C2K file on different platforms

Open .C2K File on Windows

  • Right-click a .C2K
  • Left-click "Open With" > "Choose another app"
  • Select the program that opens .C2K file and Select check box "Always use this app to open .C2K files" Press "Ok"

Open .C2K File on Mac

  • Right-click (or Ctrl + Left-click) the .C2K file
  • Click "Open With" > "Other.."
  • Then choose another program from the app list and press "Open"
  • Select check box "Turn on" for "Always open in app"

Open .C2K File on Linux

Right click on the .C2K file, choose "Open with" and select a program from the list above

Open .C2K File on iPhone

Select a file. If you don't see an application to open the .C2K file, tap "Share" and choose the right app.
Method 2
Save the file. Then open the app «Files». Touch and hold the file, then release your finger. You will see a black menu bar. After that tap "Share" and select an application.

Open .C2K File on Android

Tap the Settings icon on an Android smartphone, then select «Applications». Click the Settings icon in the upper right corner of the screen, to change the default apps.
If you want to open, edit, save or even convert .C2K files on Android, then your best bet is to download one of the dedicated apps available on Google Play.

How to fix problems with .C2K files

  1. You need to update the application that you normally use to open .C2K files. Only the latest version of the software supports the current .C2K file format
  2. You need to check the .C2K file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)