Section 16 - When Monday a holiday; validity of acts on Saturday afternoon and certain holidays; option of banks as to keeping open(a) Whenever the first day of January, the twelfth day of February, the fourteenth day of June, the fourth day of July, the eleventh day of November or the twenty-fifth day of December, shall any of them occur on Sunday, the following day (Monday) shall be deemed and declared a public holiday. All bills of exchange, checks, drafts, or promissory notes, falling due on any of the Mondays observed as holidays, shall be due and payable on the next succeeding secular or business day; and all Mondays observed as holidays shall, for all purposes whatever as regards the presenting for payment or acceptance, and as regards the protesting and giving notice of the dishonor of bills of exchange, checks, drafts, and promissory notes, made after the passage of this act, be treated and considered as if the first day of the week, commonly called Sunday.(b) Nothing in any law of this Commonwealth shall in any manner whatsoever affect the validity of, or render void or voidable, the payment, certification, or acceptance of a check or other negotiable instrument or any other transaction by a banking institution in this State because done or performed or transacted on any Saturday between twelve o'clock noon and midnight, provided such payment, certification, acceptance or other transaction would be valid if done or performed on or before twelve o'clock on Saturday.(c) Nothing in any law of this Commonwealth shall in any manner whatsoever affect the validity of, or render void or voidable the payment, certification, or acceptance of, any bill of exchange, check, draft, promissory note, or other negotiable instrument, or any other transaction by a banking institution in this State, because done or performed or transacted on any of the following legal holidays: the twelfth day of February, the third Monday in February, Good Friday, the fourteenth day of June, the second Monday in October, or the first Tuesday after the first Monday of November, the eleventh day of November or whenever any of said days shall occur on Sunday, done or performed or transacted on the following day (Monday): Provided, Such payment, certification, acceptance, or other transaction would be valid if done or performed on a secular or business day: Provided further, however, That for the purpose of protesting or otherwise holding liable any party to any bill of exchange, check, draft, promissory note, or other negotiable instrument which shall not have been paid on any of said holidays, a demand for acceptance or payment thereof shall not be made, and notice of protest or dishonor thereof shall not be given, until the next succeeding secular or business day. Nothing herein shall be construed to require any banking institution to keep open for the transaction of business on any of said holidays, or to require any banking institution which elects to be open for business on all or any part of any of said holidays, to do or perform any act or transaction on such holiday; but all acts and transactions done or performed on any such holiday shall be at the option of such banking institution.1893, May 31, P.L. 188, No. 138, § 2. Amended 1897, June 23, P.L. 188, § 1; 1911, Feb. 16, P.L. 3, § 1; 1929, April 30, P.L. 900, § 1; 1937, May 7, P.L. 601, No. 155, § 1; 1947, May 1, P.L. 128, No. 52, § 2; 1951, June 28, P.L. 903, No. 167, § 1; 1968, Dec. 12, P.L. 1209, No. 380, §2, effective 1/1/1971; 1970, Dec. 2, P.L. 827, No. 272, §1, effective 1/1/1971; 1973, Nov. 28, P.L. 352, No. 122, § 1, imd. effective.