Beltane is the second principal Celtic festival (the other being Samhain). Celebrated approximately halfway between Vernal (spring) equinox and the midsummer (Summer Solstice). Beltane traditionally marked the arrival if summer in ancient times.
At Beltane the Pleiades star cluster rises just before sunrise on the morning horizon, whereas winter (Samhain) begins when the Pleiades rises at sunset. The Pleiades is a cluster of seven closely placed stars, the seven sisters, in the constellation of Taurus, near his shoulder. When looking for the Pleiades with the naked eye, remember it looks like a tiny dipper-shaped pattern of six moderately bright stars (the seventh can be seen on very dark nights) in the constellation of Taurus. It stands very low in the east-northeast sky for just a few minutes before sunrise.
Beltane, and its counterpart Samhain, divide the year into its two primary seasons, winter (Dark Part) and summer (Light Part). As Samhain is about honoring Death, Beltane, its counter part, is about honoring Life. It is the time when the sun is fully released from his bondage of winter and able to rule over summer and life once again. (from witchvox.com)
The beginning of May was a very popular feast time for the Romans. It was devoted primarily to the worship of Flora, the goddess of flowers. It was in her honor a five day celebration, called the Floralia, was held. The five day festival would start from April 28 and end on May 2. The Romans brought in the rituals of the Floralia festival in the British Isles. And gradually the rituals of the Floralia were added to those of the Beltane. And many of today’s customs on the May Day bear a stark similarity with those combined traditions. (from theholidayspot.com)
Here are the flowers for Flora. Sorry, not up to a photograph of the Pleiades (if I could even do that). I am a prisoner in my own cottage, playing nursemaid to my dog.