<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>The following question was posed to me and I gave an educated guess.</div><div>However, I'd like an halachic response with sources.</div><div>Thanks.</div><div><span class="Apple-style-span" style="font-size: 16px; line-height: 14px;"><br></span></div><div><span class="Apple-style-span" style="font-size: 16px; line-height: 14px;"><br></span></div><div><span class="Apple-style-span" style="font-size: 16px; line-height: 14px;"><div style="line-height: normal; font-size: medium; ">I will be flying back from Poland where I'll be teaching the day of Tisha b'Av.</div><div style="line-height: normal; font-size: medium; ">Because of the time difference, if I were to go by sunset for ending the fast,</div><div style="line-height: normal; font-size: medium; ">it would add 6 hours additional than were I to have remained in Poland. What</div><div style="line-height: normal; font-size: medium; ">does halacha say about this? If I fast for the 25 or so hours, then it will be </div><div style="line-height: normal; font-size: medium; ">daylight where I land. </div></span></div><div><span class="Apple-style-span" style="font-size: 16px; line-height: 14px; "><br></span></div><div><span class="Apple-style-span" style="font-size: 16px; line-height: 14px; "><br></span></div><div><span class="Apple-style-span" style="font-size: 16px; line-height: 14px;"><br></span></div></body></html>