Weird request but I have had a timelapse camera going in a workshop for a few years now. I have amassed over 40k photos and I need to delete all the images where nothing is happening. Is there a quick way to select all the jpegs that were taken at weekends and also those taken between 6pm and 8am? I'm using a mac. Thanks for any help!

Currently there is no option to automatically select by a certain date or time, but you can filter for other criteria, see: http://lrtimelapse.com/tutorial/long-ter...ime-lapse/
LRTimelapse 4 will bring even more filters.

Thanks for that - very interesting. Looking forward to seeing what's in V4.

Check it out, it's available! :-)

Is there anywhere that describes how to use the new features in LR4 for long term time-lapse? having a hard time figuring out the details.
smoothing? low?
thanks

Did you check the instructions for the long term workflow in http://lrtimelapse.com/workflow ?