Why does the Yang have to follow the Ying so quickly?

I know the title of this post is a bit befuddling but I hope it will all become clear. This past weekend is a great case for my question. I attended a family wedding on Saturday and it was fantastic. Everyone did something to make the day a success. Whether it was preparing food, decorating the village hall (which was the venue), creating flower arrangements etc. it all came off without a hitch even the weather did its part to make the day perfect.
It was back to work this morning so that meant an early night last night to be ready to tackle the week ahead which I knew would have its own set of challenges.

I had a feeling when I woke up this morning and found a cold sore that had developed overnight, that it might not be a great day. My taxi was booked for 7:00 a.m. and it arrived promptly giving me hope that maybe I was wrong and cold sore was not an omen for the remainder of my day. I ensured that the driver knew the route I wanted to take and mentioned that I might close my eyes for awhile (hoping this would say) “I’m too tired to chat”. However that message did not get across on the first attempt. An hour later as we approached a queue of traffic I took my opportunity to shut my eyes for a few minutes. When I opened my eyes and looked around I got the distinct feeling we were not where we were supposed to be. I caught sight of a mile marker post just as it flashed by and I thought for sure it said M40 (we were meant to be on the M42. ) Even if you don’t know specifically where I’m talking about I’m sure you get the point I was not on the correct motorway! I waited for the next junction sign to make certain I was right before speaking. Sure enough the next sign comes up and I now know I’m in the wrong place.
I said to the driver “we are on the M40 not the M42″ he said ” are we?” Which worried me even more. I wondered if he too closed his eyes for a while! He apologised profusely but the damage was done. That error added another hour and a half to my journey getting me to work at 10:45 instead of 9:00’ish.
Finally I arrive at work and there are 3 people waiting to speak to me. This was another bad sign. After these 3 impromptu meetings one of which contained more bad news I returned to my new desk (yes yet another seating change on Friday) to find out they did not set up my equipment properly and my laptop refused to play nice with my mouse or my monitors. Getting itself in such a tizzy that it eventually “blue screened” technical term for “going belly up!” I had to raise a HelpDesk call then wait for IT to arrive. In the end it was 12:05 when I was finally able to log in and start to work.

So back to my question “why does Yang have to follow Ying so quickly?” I had a beautiful weekend (the Ying) then the Yang (my rubbish day today) could not wait to balance the scales.
The good news is I will always remember the wedding and will completely forget the rubbish day.