Shearith Israel’s “Omer Board” dates back to the Mill Street Synagogue of 1730, and may indeed go back to the early years of the Congregation’s history. Beginning the second night of Passover, the “Omer” is counted. The “Omer” is counted each night for a period of seven weeks, concluding with the Shavuot festival. The Board includes the headings H (for Homer i.e. Omer; or Hoy, today); S (for Semana, week); and D (for Dia, day).