The following are Ellen White quotes regarding any mention she makes regarding the date line (Updated June 11, 2013):
Chap. 40 – The Question of the Date Line
The Sabbath Made for a Round World
God rested on the seventh day, and set it apart for man to observe in honor of His creation of the heavens and the earth in six literal days. He blessed and sanctified and made holy the day of rest. When men are so careful to search and dig to see in regard to the precise period of time, we are to say, God made His Sabbath for a round world; and when the seventh day comes to us in that round world, controlled by the sun that rules the day, it is the time in all countries and lands to observe the Sabbath. In the countries where there is no sunset for months, and again no sunrise for months, the period of time will be calculated by records kept. . . . {3SM 317.1}
The Lord accepts all the obedience of every creature He has made, according to the circumstances of time in the sun-rising and sun-setting world. . . . The Sabbath was made for a round world, and therefore obedience is required of the people that are in perfect consistency with the Lord’s created world.–Letter 167, 1900. {3SM 317.2}
The Date Line Problem
Sister T has been speaking of you to me. She says that you are in some confusion in regard to the day line. Now, my dear sister, this talk about the day line is only a something that Satan has devised as a snare. He seeks to bewitch the senses, as he does in saying, “Lo, here is Christ, or there.” There will be every fiction and devising of Satan to lead persons astray, but the word is, “Believe it not. For there shall arise false Christs, and false prophets, and shall shew great signs and wonders; insomuch that, if it were possible, they shall deceive the very elect. Behold, I have told you before. Wherefore if they shall say unto you, Behold, he is in the desert; go not forth: behold, he is in the secret chambers; believe it not” (Matthew 24:23-26). {3SM 317.3}
Seventh-day Sabbath Left in No Uncertainty.– We have the positive word of God in regard to the Sabbath [Exodus 31:12-18 quoted]. {3SM 318.1}
Is it possible that so much importance can be clustered about those who observe the Sabbath, and yet no one can tell when the Sabbath comes? Then where is the people who bear the badge or sign of God? What is the sign? The seventh-day Sabbath, which the Lord blessed and sanctified, and pronounced holy, with great penalties for its violation. {3SM 318.2}
The seventh-day Sabbath is in no uncertainty. It is God’s memorial of His work of creation. It is set up as a heaven-given memorial, to be observed as a sign of obedience. God wrote the whole law with His finger on two tables of stone. . . . {3SM 318.3}
Now, my sister, . . . I write . . . to tell you that [u]we are not to give the least credence to the day line theory[/u]. It is a snare of Satan brought in by his own agents to confuse minds. You see how utterly impossible for this thing to be, that the world is all right observing Sunday, and God’s remnant people are all wrong. This theory of the day line would make all our history for the past fifty-five years a complete fallacy. But we know where we stand. . . . {3SM 318.4}
To Stand Fast by Our Colors.– My sister, let not your faith fail. We are to stand fast by our colors, the commandments of God and the faith of Jesus. All those who hold the beginning of their confidence firm unto the end will keep the seventh-day Sabbath, which comes to us as marked by the sun. The fallacy of the day line is a trap of Satan to discourage. I know what I am speaking about. Have faith in God. Shine where you are, as a living stone in God’s building. {3SM 318.5}
The children of God will be triumphant. They will come off conquerors and more than conquerors over all the opposing, persecuting elements. Fear not. By the power of Bible truth and love exemplified in the cross, and set home by the Holy Spirit, we shall have the victory. The whole battle before us hinges upon the observance of the true Sabbath of Jehovah. . . . {3SM 319.1}
I can write no more now, but I say, Give no ear to heresy. Cling to a plain “Thus saith the Lord.” He will comfort and bless you, and will give you joy in your heart. Praise the Lord that we have clear light, and a plain, distinct message to bear.–Letter 118, 1900. {3SM 319.2}
******************************************************************************************************
Between Samoa and Auckland we crossed the day-line, and for the first time in our lives we had a week of six days. Tuesday, December 1, was dropped from our reckoning, and we passed from Monday to Wednesday. {BEcho, January 1, 1892 par. 14}
At daylight of December 3, the coast of new Zealand was in sight, and about noon our boat reached the dock at Auckland. This is a beautiful harbor, and the town on the hills above presents a fine appearance. We had hoped to meet Elder Gates of the Pitcairn here; but in this we were disappointed; and my son, W. C. White, remained a few days to see him, rejoining us at Sydney. As our boat touched the wharf, a number of brethren stepped on board, and introduced themselves to us, and we had a glad meeting. On landing, we rode to the house of Bro. Edward Hare. Here we found a pleasant home, and were refreshed with delicious strawberries, oranges, bananas, and more substantial viands. Then we had a very enjoyable ride into the country. The fresh, sweet air filled with the fragrance of wild roses, sweet-brier, and new-mown hay, reminded us of our northern summer, the green hedges separating the fields are like England, while there is much in the landscape that resembles California. The vegetation and the general appearance of the country is that of the temperate zone rather than the tropics. {BEcho, January 1, 1892 par. 15}
God rested on the seventh day, and set it apart for man to observe in honor of His creation of the heavens and the earth in six literal days. He blessed and sanctified and made holy the day of rest. When men are so careful to search and dig to see in regard to the precise period of time, we are to say, God made His Sabbath for a round world; and when the seventh day comes to us in that round world, controlled by the sun that rules the day, it is the time in all countries and lands to observe the Sabbath. In the countries where there is no sunset for months, and again no sunrise for months, the period of time will be calculated by records kept. . . . {3MR 253.1}
The Lord accepts all the obedience of every creature He has made, according to the circumstances of time in the sun-rising and sun-setting world. . . . The Sabbath was made for a round world, and therefore obedience is required of the people that are in perfect consistency with the Lord’s created world.–Letter 167, 1900, pp. 1-3. (To Brother Irwin, March 23, 1900.) {3MR 253.2}
Is it possible that so much importance can be clustered about those who observe the Sabbath, and yet no one can tell when the Sabbath comes? Then where is the people who bear the badge or the sign of God? What is the sign? The Seventh-day Sabbath, which the Lord blessed and sanctified, and pronounced holy, with great penalties for its violation. {3MR 254.2}
The seventh-day Sabbath is in no uncertainty. It is God’s memorial of His work of Creation. It is set up as a Heaven-given memorial, to be observed as a sign of obedience. God wrote the whole law with His finger on two tables of stone. . . . {3MR 255.1}
Now, my sister, although I am at present sick, I write sitting up in bed to tell you that we are not to give the least credence to the day-line theory. It is a snare of Satan brought in by his own agents to confuse minds. You see how utterly impossible for this thing to be, that the world is all right observing Sunday, and God’s remnant people are all wrong. This theory of the day line would make all our history for the past fifty-five years a complete fallacy. But we know where we stand. . . . {3MR 255.2}
My sister, let not your faith fail. We are to stand fast by our colors, the commandments of God and the faith of Jesus. All those who hold the beginning of their confidence firm unto the end will keep the seventh-day Sabbath, which comes to us as marked by the sun. The fallacy of the day line is a trap of Satan to discourage. I know what I am speaking about. Have faith in God. Shine where you are, as a living stone in God’s building. {3MR 255.3}
We took Brother and Sister Haskell with our team to the station at Dora Creek. On the way Brother Haskell read an article on the day line, written to meet the fallacies that are coming in to make everything uncertain in regard to when the seventh day comes. {10MR 342.1}
It would be very strange if the Lord God of heaven should set apart a day for people to observe, and bless and sanctify that day, and give it to man and enjoin upon man that it be kept holy unto the Lord as a memorial that He made the world in six days and rested upon the seventh day and blessed the Sabbath day, and yet that day become so uncertain the world cannot tell definitely when the seventh day comes to us. {10MR 342.2}
Here is a day given, and the Lord declares it shall be observe throughout your generations “for a perpetual covenant” (Exodus 31:16), as a sign of obedience and loyalty to God, and yet it is so obscured no one can tell when it comes! Oh, what fallacies men will resort to in order to carry out false theories. The Lord pronounced His blessing upon all who keep holy the Sabbath day. His commandments are given to a thousand generations, and when that period is ended the redeemed host shall be in the city of God and observed the Sabbath there, and especially come up to worship God from Sabbath to Sabbath and from one new moon to another. (Isaiah 66:23.)– Ms. 173, 1897, pp. 4, 5. (Diary, June, 1897.)
*************************************************************************************************
MR No. 958 – Sabbathkeeping in Arctic Lands
God rested on the seventh day, and set it apart for man to observe in honor of His creation of the heavens and the earth in six literal days. He blessed and sanctified and made holy the day of rest. When men are so careful to search and dig to see in regard to the precise period of time, we are to say, God made His Sabbath for a round world; and when the seventh day comes to us in that round world, controlled by the sun that rules the day, it is the time, in all countries and lands, to observe the Sabbath. In the countries where there is no sunset for months, and again no sunrise for months, the period of time will be calculated by records kept. But God has a world large enough, and proper and right for the human beings He has created to inhabit it, without finding homes in those lands so objectionable in very many, many ways. {12MR 159.1}
The Lord accepts all the obedience of every creature He has made, according to the circumstances of time in the sun-rising and sun-setting world. Obedience is the test; and all this plowing into the intricacy of the precise minutes and hours of the Sabbath–it is the test of man’s obedience to honor and glorify God. To sin, or transgression of His law, God will prove a consuming fire. The Sabbath observance is “a sign between Me and you throughout your generations forever.”–Letter 167, 1900, pp. 1, 2. (To G. A. Irwin, March 23, 1900.)
White Estate Washington, D. C. Dec. 2, 1982 {12MR 159.2}