Section 1
SECTION 1. The standard time of the Philippines shall be fixed upon the basis of the mean astronomical time at one hundred and twenty degrees East Longitude, Greenwich Meridian: Provided, That the President of the Philippines may, when the public interest so requires, and at any time or times, within the periods from March to June and from November to January, all inclusive, establish; by proclamation, a daylight saving time, by advancing by one hour, on such date as he shall determine, the standard time herein fixed, and by retarding such daylight saving time by another hour on such other date as he shall determine, so that during certain periods of the year, as above indicated, the standard time shall be one hour in advance of the mean astronomical time at one hundred and twenty degrees East Longitude, Greenwich Meridian. The President shall, in such proclamation, fix the date and hour when such daylight saving time shall commence and terminate.