O símbolo ‡ no A / FD especifica que o local observa o horário de verão.
Esta é a legenda da A / FD, que pode ser encontrada on-line, indo para o on-line A / FD digital e procurando por um aeroporto. O link Legenda A / FD estará, então, no topo dos resultados da pesquisa (infelizmente, o link muda a cada ciclo para que eu não possa incluir um link exato).
6 TIME CONVERSION
Hours of operation of all facilities are expressed in Coordinated Universal Time (UTC) and shown as ‘‘Z’’ time. The directory indicates the number of hours to be subtracted from UTC to obtain local standard time and local daylight saving time UTC–5(–4DT). The symbol ‡ indicates that during periods of Daylight Saving Time effective hours will be one hour earlier than shown. In those areas where daylight saving time is not observed the (–4DT) and ‡ will not be shown. Daylight saving time is in effect from 0200 local time the second Sunday in March to 0200 local time the first Sunday in November. Canada and all U.S. Conterminous States observe daylight saving time except Arizona and Puerto Rico, and the Virgin Islands. If the state observes daylight saving time and the operating times are other than daylight saving times, the operating hours will include the dates, times and no ‡ symbol will be shown, i.e., April 15–Aug 31 0630–1700Z, Sep 1–Apr 14 0600–1700Z.