How to delete a tag in Github.

Following commands can be used to delete a tag in git.

1. Delete tag from local
     git tag -d [tag];

2. Push changes to remote
     git push origin :[tag]

Example :
    
Let say you have created a tag by name v6.37.1 . Now to delete the tag from git :

1.  git tag -d v6.37.1

2.  git push origin :v6.37.1

NOTE :
If your tag has the same name as one of your branches then ,

1. git tag -d [tag]

2. git push origin :refs/tags/[tag]