The Italian preposition da means "from" in English. This preposition is used in time expressions, in which case you may translate it as "since" or "for." Italian uses the construction of present tense da time expressions to indicate an action that began in the past and is still going on in the present. For example:

Da quanto tempo leggi questa rivista? (How long have you been reading this magazine?)

Leggo questa rivista da molto tempo. (I