Fallacies: I'll have more time in a few months

I recently posted about 42 errors in reasoning. I'm wonder how this fallacy fits in: "I'll have more time in a few months".

Sometime in the past six months I read that many busy people expect that their lives will be less busy sometime in the "near future". It turns out that this rarely happens; at a given phase of one's life all randomly sampled times are approximately equally busy. In terms of task management, if there's a project one is to busy for right now, it is fair to assume that one will not have time for it in the near to medium future.

Clearly this cannot always be true. I recall some relatively quiet periods in my life only ... ummm ... 20 or 30 years ago. Ok, so the rule holds.

I'd like to find a reference on this, if anyone knows of it please tell me in the comments.