PhD admission forms are usually available in the spring and autumn semesters. The spring cycle usually starts in January and ends in June, while the autumn session starts in July and ends in December.

There are separate subject seats announced for each university every year which can be central university,state university and private university on their official website for phd in hindi admission.you need to keep visiting the site to know when the application begins.

Start working on applications in early fall if you're a Master's student or final year.also you can give ugc net exam which is conducted in December to skip the written test of phd entrance exam.if you qualify NET you can directly appear in interview.

Moreover,To do PhD in Hindi, one has to complete PG and MPhil degree in any stream with at least 55% marks from a recognized university . Most colleges and universities have entrance exams for PhD admission.