Linux Day is celebrated on the 25th of August or on the Saturday immediately after the 25th of August as a form of thanksgiving. Linux is an open source operating system developed by the community under the model of free and open software. The primary component of Linux is the kernel which was first released September 17, 1991 by Linus Torvalds. You can find Linux in servers, mainframe computers, most supercomputers and smartphones. Android OS is based on the Linux kernel. I use it on my desktop and laptop. Thank you Linux.