Mild sunburn usually lasts 3-5 days. Moderate or severe sunburn usually lasts at least several days longer. The effects of each episode of this radiation damage, however, are long lasting. Each sunburn increases the risk of early wrinkles, premature aging, senile skin lesions, and skin cancers.
How old does a song have to be to be considered a classic? In my opinion a new generation have to grow to adulthood for a song be regarded as a classic therefore somewhere between 20-25 years would di it.
The traditional categories are Medieval Music (1150 to 1400), Renaissance Music (1400 to 1600), Baroque Music (1600 to 1750), Classical Music (1750 to 1830), Romantic Music (1830 to 1920) and Contemporary Music (1920 to the present).