Every day is different

True. But neutral expression is the best. If you can learn to live without too much happiness or too much sadness, you can live long without problems. If you use to live a life with a lot of happiness today, you will not be able to bear any sadness tomorrow.
Who knows what happens next?? Normally you may have ups and downs equally. 

If you wish to be lazy it is better to smile than to frown.
Apparently it takes only 17 muscles to smile and 32 to frown so why waste energy frowning.   

Nice 

From the chaos, a voice spoke to me "Smile and be happy, because things could be worse!"
I smiled and were happy - then things became worse.

Tomorrow shall be better, so try not to be too happy now.  You may be too tired to celebrate later.

Ofcourse every day is different but be happy and smile if it comes in any moment of that particular day dont wait for tomorrow.

I am glad that every day is different.
If it wasn't then life would be so boring..........

Yes every day is different and I think every coming day i.e tomorrow of a leader is always better than the previous day.