holiday for a particular date, and in calling a special election for a delegate to the Assembly, or for a provi ncial office he shall limit such holiday, if one is declared, to the particular district or province where the election is held. [1671-2; 1818-2.] SECTION  29 . Pretermission of Holiday in Performance of Civil Act. — When any act is appointed by law or contract to be performed upon a particular day, which day falls upon a legal holiday, the next succeeding business day shall be deemed to be the day for  the due performance thereof. [2081-194.] SECTION  30 . Standard Weights and Measures in Philippine Islands. — The weights and measures to be used throughout the Philippine Islands are those of the metric system, with the following units: The length of the standard meter shall be determined for the Philippine Islands by the length at the temperature of zero degrees centigrade of the fundamental standard measure numbered seventy-one, now preserved in the Bureau of Science and certified to by t he International Bureau of Weights and Measures. The weight of the standard gram shall be determined for the Philippine Islands by the weight at Manila of one-millionth of a cubic meter of pure water at the temperature of four degrees centigrade, or the one-thousandth part of the standard kilogram certif ied to by the International Bureau of Weights and Measures, designated by the symbol "L" and now preserved in the Bureau of Science. Copyright 2012 CD Technologies Asia, Inc. and Accesslaw, Inc. Philippine Law Encyclopedia 2011 9 Weights and Measures ARTICLE  IX (a) The unit of length is the standard meter, being the one ten-millionth part of the distance from the equator to the pole. (b) The unit of area is either the square meter or an area of one hundred square meters known as the are. (c) The unit of cubical contents or capacity is either the cubic meter or the one-thousandth part thereof known as the liter. (d) The unit of weight is the gram.