Currently on SO there is a group of similar tags:

I think D and T should be merged into DT, or at least D.

closed as off-topic by ale, Aziz Shaikh, gnat, Martijn Pieters, hims056 Aug 8 '14 at 11:26

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  • Why would you do that? Not even in spoken language those can be merged.."What time is it today?" "What's the date?" Are completely different (and are wrong too) from "what date is today?" and "WHat's the time?". Imagine in a programming language then...As for data types, I only know MySQL and that has enough reasons alone to reject your proposal – Damien Pirsy Jun 8 '12 at 18:04
  • @DamienPirsy: Because there are a lot of questions tagged by both [date] and [datetime] and that makes no sense to me. – abatishchev Jun 8 '12 at 18:06
  • Well, the problem is yours then. DATE is a...date, while DATETIME is..a date plus the time. I don't see how they could be equal. Another example: in php, date() does something, time() something else, and datetime() doesn't exist as a built-in function. Just saying. COuld you be more specific on why those tags don't make sense to you? not just a feeling, but an argumentative answer – Damien Pirsy Jun 8 '12 at 18:09
  • PS: I see now your quest on correcting tags and by skimming the upvotes it looks like a good job. But there's a saying whereI live (don't know the english equivalent):"Not all the donuts come out with a hole"; I think you've been overzealous this time ;) – Damien Pirsy Jun 8 '12 at 18:13
  • @DamienPirsy: Seems that I've been indeed. btw here's some links – abatishchev Jun 8 '12 at 18:14
  • Uhm, people's mistagging isn't a reason per se to say that tags are wrong. Should I propose to merge jQuery and javascript too, since people are always using them in conjunction, and jQUery is javascript? – Damien Pirsy Jun 8 '12 at 18:17
  • @DamienPirsy: Agree with the first part, and don't with the second. I think both should be used when a free space available. The same for .net and c#, sql and tsql, etc. – abatishchev Jun 8 '12 at 18:19

No, I wouldn't.

Some languages explicitely differ between date and datetime data types and questions about these types can be very specific. Imo, having distinct tags for them is a good thing.

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