From the twelfth century to 1752, Lady Day (which was the official date of the spring equinox) was counted as the first day of the legal year in Britain.
In Christian lore it marks the Annunciation when an angel (‘messenger’) visited the Virgin Mary and announced that she would bear the saviour of mankind. When the angel left, she found that she was pregnant. Her son, called Jesus Christ, sacrificed himself to redeem the world, and was crucified wearing a crown of thorns. There was a superstition that if Easter should fall on Lady Day then some disaster will shortly follow: ‘When my Lord falls in my Lady’s lap, England beware of some mishap.‘