What does "modification time support" mean?

What is the problem you are having with rclone?

I'm not sure if it's a problem or a misunderstanding, so I left out logs for now. Documentation for remotes like Box and WebDAV (Nextcloud) mention last modified time support, but when I sync, the remote file's modification time is the time of sync rather than the local file's modified time. Am I misunderstanding this feature? I believe it occurs in both directions. Thanks!

What is your rclone version (output from rclone version)

rclone 1.53.1
- os/arch: linux/amd64
- go version: go1.15.2


rclone uses size and/or mod-time of the source file to determine if it should copy that file from the source to the dest. it depends on the command.

given that you have not provided any of the requested info, hard to help you.

I didn't provide more info because I don't think I need help, just clarification. Based on what you describe, "modification time support" means rclone uses the modification time of the file (rather than just size) to determine whether to sync it? "Modification time support" does not mean rclone syncs modified time values across remotes? That's what I thought at first

Listed are the remotes that support modification time:

Here is the information related to what mod time means: