What is the main idea of the poem ‘Dust of Snow’?

Answer – Dust of Snow is a beautiful poem of nature written by Robert Frost. In this poem a symbolic incident is described by the poet. The poet is standing beneath a hemlock tree in sad mood. He thinks that his day has been lost. Suddenly a crow shakes the hemlock tree and some snow fall on the poet. This little incident bring change in state of poet's mind.  His mood changed.  He thinks that it is saved the rest of his day and feels that part of the day has been saved.