Current Status
From cppreference.com
                    
                                        
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                    Recent milestones: C17 published, C23 underway
C17 has been published, and work is now underway on C23.
| This section is incomplete Reason: duplicate of the wording in the C++ page  | 
The current schedule is in paper N2984.
You can also visit open-std.org to get the latest C standards committee papers. Reading through those proposals, you can track the C developing trends and know how does a cool idea turned into the standard. However, those papers ARE NOT and also SHOULD NOT BE TREATED AS the standard documents.
See also
|   C++ documentation for Current status 
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