blissful

blissful
bliss‧ful /ˈblɪsfəl/ adjective
1. extremely happy or enjoyable:
    blissful sunny days
2. blissful ignorance a situation in which you do not yet know about something unpleasant
—blissfully adverb:
    Jean seems blissfully happy.
    blissfully unaware of the impending danger
     

THESAURUS

■ very happy
   ▪ delighted [not before noun] very happy because something good has happened: The doctors say they are delighted with her progress.
   ▪ thrilled [not before noun] very happy and excited about something: He’s thrilled at the idea of going to Disneyworld.
   ▪ overjoyed [not before noun] very happy because you have heard some good news: She was overjoyed when she found out that her son was safe.
   ▪ be on top of the world (also be over the moon British English) [not before noun] informal to be very happy: I was over the moon when I won the championship.
   ▪ ecstatic extremely happy: The crowd were ecstatic, and cheered wildly. | ecstatic fans
   ▪ blissful a blissful time is one in which you feel extremely happy: We stayed on the islands for two blissful weeks. | It sounded blissful – sea, sun, and good food.