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Sky Calendar - download
Download the installation file:
| Operating system | Program version | Dated | File Name | Size | |
 Windows 8.1, 10 or 11 - 32 bit |
4.9 | nk4a.exe | 10,2 MB | Download | |
| Windows 8.1, 10 or 11 - 64 bit |
4.9 | nk4b.exe | 11,5 MB | Download | |
 MacOS 10.13 to 10.15 - 64 bit |
4.9 | NK4Mac.zip | 16,10 MB | Download |
Program installation:
- Windows: Run the downloaded file and follow the instructions of the installer. If you experience problems, check out the page FAQ.
- Mac: Be sure to read the Recommended Installation Procedure!
is part of the installation, but you can also download it separately (1,83 MB).
Alternatively, you can download the program just as a ZIP file to save Sky Calendar without installation (Windows only):
| Operating system | Program version | Dated | File Name | Size | |
| Windows 8.1, 10 or 11 - 32 bit |
4.9 | nk4a.zip | 13,0 MB | Download | |
| Windows 8.1, 10 or 11 - 64 bit |
4.9 | nk4b .zip | 15,2 MB | Download |
Save and run program:
Download the program, unpack it to any empty folder and run NK4.exe.
Unregistered version restrictions:
- All work can be done only for period of 2000 to 2030 years (for 1 to 3000 years in registered version).
- There are no other restrictions in unregistered version of Sky Calendar!
| Sky Calendar - Home | Download | Price & Purchase | FAQ | Fertile days | Contact & Privacy | Czech & Slovak version |