Can we clone an activity from a previous day ?

Can I, somehow, clone the Wednesday activity but make it appear on Friday ? Would be useful for stats.

On the other hand you could also export your wednesday activity as TCX-file.
Open it with wordpad/notepad and search for date of wednesday (2017-05-24) and replace every appearance with date of friday (2017-05-26). Save it.
Then reimport it with https://connect.garmin.com/modern/import-data.

I would like to be able to copy manual activities.  I enter my gym workouts into Garmin Connect and I rotate through several predictable workout routines. The ability to copy a previous activity would be a time saver. Exporting, editing and importing takes about as much time as a whole new manual entry.

I would love to do this, and have never found a way.   Yes, entering an entire weight-machine workout with all those many dropdown menus, etc. takes *forever*, and it's almost the same each time!

Do it just like philipshambrook  explained above. You can do it even simpler and quicker without the need to edit the file at all:

1. Export the file in TCX format (it wouldn't work with the FIT file)
2. Change the time and/or date of the original activity in GC
3. Import the TCX file

Now you have two identical activities, each with a different time stamp.

However, I find copying an activity unwise. That's the role of the watch, and should not be done manually. When you copy an activity, all data (HR, temperature, elveation profile, movent,...) will be faked, just a copy of another activity, not the true monitoring of a real activity. I don't see any sense in doing it. You better simply start the activity manually on your watch, and let it record for you. This is what it was made for.

If you follow a scheduled workout, all the stages of the workout will be stored along with the true data, so I really do not understand the need of faking the activity artificially by copying an existing one.

You would want to do this when you create the original activity manually after the fact, so there is no monitoring data to worry about.

I look exactly for the same! On from my point of view adding the feature 'copy activity' can't be a development issue for garmin devs. Both named 'kinda' solutions are just bad workarounds.

Garmin Connect was designed for storing data recorded by your Garmin device, hence cloning existing activities makes no sense, and there is no reason why Garmin should imlement such option. If you are not able to do the same activity today as you did yesterday, you should not be copying the old actvity just to fool yourself (or whoever else) with the faked stats.

Cloning makes sense only in very exceptional cases - for example if you lost an activity due to battery power shortage, and could not save it, and for such cases, the above mentioned workarouds are just fine.