Some of the questions I get from runners are not about how they're feeling during their runs, but about various issues they experience after running.

The guy had a reputation for selling good acid so I happily gave him my cash.

We'll have a wonderful time tomorrow.

Therefore, using this idiom indicates a sarcastic attitude toward the work that we must do, especially when we would prefer not to be working, but rather to be having fun and playing games instead.

We have had an happy time.