Some days would be grumbling days if you let them. The really important thing is not to let them.
"‘You must have left it somewhere,’ said Winnie the Pooh. ‘Somebody must have taken it,’ said Eeyore. ‘How like them,’ he added, after a long silence.” A. A. Milne
“Do everything without grumbling (secret displeasure; murmuring). . . .” Philippians 2:14.