Ostara, or Ēostre, is actually a Germanic goddess of spring and dawn, not traditionally Irish or Celtic. She represents fertility, renewal, and the balancing of light and dark at the vernal equinox. Modern pagans often celebrate her during the spring equinox (around March 20-22) to mark the end of winter. 
Key Details About Ostara (Ēostre)
Origin: The name stems from the Germanic goddess Ēostre (or Ostara), first mentioned in the 8th century by the Anglo-Saxon monk Bede.
Celtic Connection: While not natively Irish, the festival is integrated into the "Celtic Wheel of the Year" as a time to welcome spring and fertility.
Symbols: Common symbols of Ostara include the hare (representing fertility and rapid reproduction) and eggs (representing new life and rebirth).
Goddess of Spring: She is associated with the dawn, rising light, and the earth waking from winter.
Modern Celebration: Today, Ostara is celebrated by modern Pagans and Wiccans with rituals involving planting seeds, decorating eggs, and honouring the balance of day and night.
While the figure of Ostara is not rooted in Irish mythology, the themes of the spring equinox are universally celebrated in modern, eclectic pagan traditions that often combine Celtic, Germanic, and other European folklore. 
This stunning bronze statue of Ostara is 12x10x27cm