"Popularity day" refers to a specific day or period when someone or something is very well-liked, admired, or widely known. It means being popular or receiving a lot of attention and admiration from others. Full definition
Flash forward to flash fiction, a form of fiction writing which is increasing in popularity day by day. (fictionsoutheast.com)
The idea of Virtual stores for grocery is also gaining popularity day by day. (dazeinfo.com)
Due to its high - quality fabrics and awesome prints it is gaining popularity day by day not only nationally but also at international level. (stylesgap.com)