PDT is Pacific Daylight Time: the summer clock on the west coast of North America. Cities such as Los Angeles, San Francisco, Seattle, and Vancouver use it in the warm months, when they move the clock forward one hour. PDT sits seven hours behind Coordinated Universal Time.

PDT is Pacific Daylight TimePDT是Pacific Daylight Time（太平洋夏令時間）: the summer clock on the west coast of North America也就是北美西岸夏天用的時間。Cities such as Los Angeles, San Francisco, Seattle, and Vancouver像洛杉磯、舊金山、西雅圖和溫哥華這些城市 use it in the warm months會在天氣暖的月份使用這個時間, when they move the clock forward one hour這時候他們會把時鐘往前調一小時。PDT sits seven hours behind Coordinated Universal TimePDT比世界協調時間（UTC）慢七個小時。

Though actually those same places do not keep PDT all year. In winter they switch back to Pacific Standard Time (PST), which is one hour earlier.

Though actually不過其實, those same places do not keep PDT all year這些地方並不是整年都用PDT。In winter到了冬天, they switch back to Pacific Standard Time (PST)他們會改回Pacific Standard Time（PST，太平洋標準時間）, which is one hour earlier比PDT早一小時。

News, flight boards, and online meetings write 5 p.m. PDT so people in other countries know which clock to follow.

News, flight boards, and online meetings新聞、班機看板和線上會議 write 5 p.m. PDT會寫成5 p.m. PDT這樣的格式, so people in other countries know which clock to follow好讓其他國家的人知道要對照哪個時區。

Taiwan does not change its clocks with the seasons, so the gap between Taipei and the American west coast is not the same in July and in January. People sometimes say Pacific Time and skip the extra letter; that extra letter is what stops you being an hour late.

Taiwan does not change its clocks with the seasons台灣不會隨季節調整時鐘, so the gap between Taipei and the American west coast is not the same in July and in January所以台北跟美國西岸的時差，七月和一月並不一樣。People sometimes say Pacific Time and skip the extra letter有些人會直接說Pacific Time，省略那個多出來的字母; that extra letter is what stops you being an hour late但那個字母正是讓你不會遲到一小時的關鍵。