I highly recommend looking it up and making a note of it!
Most sowing times are given in relation to the last frost, e.g. “8 weeks before the last frost”. You will therefore need to have a clear idea of when your last frost is. I highly recommend looking it up and making a note of it! Be warned; these last frost dates are average, and it’s still a good idea to pay attention to the weather forecast before you plant out anything tender.