If the Daffodils are blooming then we know for sure that Spring is here.

'I wandered lonely as a cloud....'

'When all at once I saw a crowd,
A host of golden daffodils'

'Fluttering and dancing in the breeze
Tossing their heads in sprightly dance,'

'And then my heart fills
and dances with the daffodils.'
William Wordsworth.