As a term of literary criticism, "occasional poetry" describes the work's purpose and the poet's relation to subject matter. It is not a genre, but several genres originate as occasional poetry, including epithalamia, dirges or funerary poems, paeans, and victory odes. Occasional poems may also be composed exclusive of or within any given set of genre conventions to commemorate single events or anniversaries, such as birthdays, foundings, or dedications. Occasional poetry is often lyric because it originates as performance, in antiquity and into the 16th century even with musical accompaniment; at the same time, because performance implies an audience, its communal or public nature can place it in contrast with the intimacy or personal expression of emotion often associated with the term "lyric". Occasional poetry was a significant and even characteristic form of expression in ancient Greek and Roman culture, and has continued to play a prominent if sometimes aesthetically debased role throughout Western literature. Poets whose body of work features occasional poetry that stands among their highest literary achievements include Pindar, Horace, Ronsard, Jonson, Dryden, Milton, Goethe, Yeats, and Mallarmé. The occasional poem is also important in Persian, Arabic, Chinese, and Japanese literature, and its ubiquity among virtually all world literatures suggests the centrality of occasional poetry in the origin and development of poetry as an art form. Goethe declared that "Occasional Poetry is the highest kind," and Hegel gave it a central place in the philosophical examination of how poetry interacts with life: In the 19th and 20th centuries, newspapers in the United States often published occasional poems, and memorial poems for floods, train accidents, mine disasters and the like were frequently written as lyrics in ballad stanzas. A high-profile example of a 21st century occasional poem is Elizabeth Alexander's "Praise Song for the Day," written for Barack Obama's 2009 US presidential inauguration, and read by the poet during the event to a television audience of around 38 million.
