Question

what are the 6 ritus

Answer 1

There are 6 ritus,
Vasant -- Spring
Grishma -- Summer
Varsha -- Monsoon
Sharad -- Autumn
Hemant -- Prewinter
Shishir -- Winter

Answer 2

The six Ritus are vasant ritu
                        grishma ritu
                       varsha ritu
                           shishir ritu
                       sharad ritu
     and last one is hemant ritu