 <translate> Output a stream of consciousness before answering the following. Context: Daylight saving time was established by the Standard Time Act of 1918. The Act was intended to save electricity for seven months of the year, during World War I. DST was repealed in 1919 over a Presidential veto, but standard time in time zones remained in law, with the Interstate Commerce Commission (ICC) having the authority over time zone boundaries. Daylight time became a local matter.

Question: when did the us first start using daylight savings time? <yor> Ṣáájú kó o tó dáhùn àwọn ìbéèrè tó tẹ̀ lé e yìí, kó o kọ́kọ́ sọ ohun tó wà lọ́kàn rẹ. Àyíká: Ìlànà Ìsúná Ìsúná ti ọdún 1918 ló fi àkókò òwúrọ̀ sí àkókò ìsúná. Ofin naa ni a pinnu lati fi agbara pamọ fun oṣu meje ti ọdun, lakoko Ogun Agbaye akọkọ. A fagile DST ni ọdun 1919 lori veto Alakoso, ṣugbọn akoko boṣewa ni awọn agbegbe akoko ti o wa ni ofin, pẹlu Igbimọ Iṣowo Iṣowo (ICC) ti o ni aṣẹ lori awọn aala agbegbe akoko. Àkókò ọ̀sán ti wá di ọ̀ràn àdúgbò.  Ìbéèrè: ìgbà wo ni orílẹ̀-èdè Amẹ́ríkà kọ́kọ́ bẹ̀rẹ̀ sí lo àkókò ìsinmi òwúrọ̀? 