Difference between Happily and Gaily

HAPPILY vs GAILY: ADVERB

In a joyous manner
In a happy manner or state; in happy circumstances.
With address or dexterity; gracefully; felicitously; in a manner to insure success; with success.
By chance; perhaps.
In an unexpectedly lucky way
In a happy or cheerful manner; with happiness.
With good will; in all happiness; willingly.
By good chance; fortunately, successfully.

By good fortune; fortunately; luckily.
In a happy or pleasing way or state; in pleasant or fortunate circumstances; with happiness or joy.
With address, skill, dexterity, or aptness; dexterously; felicitously; aptly; gracefully.
By chance; peradventure; haply.
Synonyms Haply, Happily. Haply, now rarely used in prose, means by chance; happily, by a happy chance.
Prosperously, successfully, contentedly.

Comfortably, Pleasantly, Quietly, Gaily, Willingly, Enthusiastically, Gladly, Cheerfully, Joyfully, With happiness, Gayly, Mirthfully, Jubilantly, Blithely, Merrily

Prettily, Airily, Daintily, Regally, Lazily, Languidly, Gleefully, Jauntily, Joyously, Cheerily, Joyfully, Blithely, Cheerfully, Happily, Merrily

Delightfully, Seamlessly, Happier, Happy, Readily, Comfortably, Pleasantly, Quietly, Gaily, Willingly, Gladly, Gayly, Mirthfully, Blithely, Merrily

Coquettishly, Dreamily, Gaudily, Unconcernedly, Placidly, Serenely, Noisily, Contentedly, Daintily, Regally, Lazily, Languidly, Joyously, Blithely, Merrily

We are both happily starting the maintenance program.
You can definitely barhop happily on that street.
Brazil heist finally living happily and in peace.
Gobble them down happily along with your coworkers.
Shayna grew up dreaming about happily every after.
Politely say no and live your life happily.
We will happily recommend you at any opportunity.
Williams and Dunst, happily, are the real stars.
He happily gave up everything for us and when we realized this we happily give up everything for him.
There are enough retailers out there that will happily accommodate their customers and I will happily patronize them!

I wouldn't recommend this course of the tinnitus etiology seems to be gaily serious.
Orr jis ka kam na ho oos k liya gaily an bin jata hi.
While Suzanne laughed gaily, it had never occurred to me, wicker basket, sturdily built.
Swettenham gaily, bowed slightly toward Matilda and once more lowered his own eyes.
All the messes were gaily decorated with evergreens, flags, paper chains, etc.
Jamaica Gaily Newsof social outreach programmes focused on health and young people.
The young girls wear silver rings and dance, gaily shaking tambourines.
The party room was gaily decorated with balloons of various colors.
In younger days he had gaily called himself a Bohemian.
Governorship will be very gaily socializing amidst the seascape.