Does the date really matter any more?
Of course we know the Last Supper was the night before the Passover because Jesus died at around three in the afternoon, the same time as the Evening Sacrifice and the killing of the Passover Lambs and couldn't observe the Passover that year because He was in the grave.
I'm confused as to how that calendar in the OP came to be.
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Here is one that uses the dates as they would be observed Biblically using the first visible crescent of the new moon to start the month.
Abib is of course, the month where there is ripe barley in the fields and that is the first month.
This one is for 2017
These Holy Day dates are for Israel and regions westward to the International Date Line.
This may be Year 6021 After Creation.
Date Sunset Moonset Illum. Sun's [Moon's at Sunset] Sun's Visib Visible?
(Evening) % Azimuth Azimuth Altitude Alt(M) Number
27 Mar 5:55 5:18 0.33 93.34 92.99 -8.25 7.71 -65.91 Not Visible
28 Mar 5:56 6:24 0.50 93.80 90.36 4.84 -5.92 57.48 Not Visible
29 Mar 5:57 7:30 3.46 94.26 87.56 18.1 -19.4 225.4 Visible
Abib 1 is Thursday, 30 Mar 2017 CE
The Passover sacrifice is Wednesday, 12 Apr 2017 CE
The Feast of Unleavened Bread begins on Thursday, 13 Apr 2017 CE
and ends on Wednesday, 19 Apr 2017 CE
The Wave Offering (the First-fruit) is Sunday, 16 Apr 2017 CE
First-fruits (Pentecost) is Sunday, 4 Jun 2017 CE
Date Sunset Moonset Illum. Sun's [Moon's at Sunset] Sun's Visib Visible?
(Evening) % Azimuth Azimuth Altitude Alt(M) Number
20 Sep 5:38 6:01 0.29 91.00 89.75 3.81 -4.84 44.69 Not Visible
21 Sep 5:37 6:36 2.39 90.54 79.75 11.4 -12.6 146.5 Visible
The Day of Trumpets is Friday, 22 Sep 2017 CE
The Day of Atonement is Sunday, 1 Oct 2017 CE
The Feast of Tabernacles (Ingathering) begins on Friday, 6 Oct 2017 CE
and ends on Thursday, 12 Oct 2017 CE
The Last Great Day is Friday, 13 Oct 2017 CE
Here is one for 2018...
These Holy Day dates are for Israel and regions westward to the International Date Line.
This may be Year 6022 After Creation.
This may be a Sabbatical (Shemittah) Year.
Date Sunset Moonset Illum. Sun's [Moon's at Sunset] Sun's Visib Visible?
(Evening) % Azimuth Azimuth Altitude Alt(M) Number
17 Mar 5:48 5:47 0.11 88.59 86.00 -1.06 0.16 -2.758 Not Visible
18 Mar 5:49 6:46 1.52 89.06 83.87 10.8 -12.1 128.2 Visible
If this spring's barley harvest is/was early, this New Moon will begin the New Year.
Abib 1 is Monday, 19 Mar 2018 CE
The Passover sacrifice is Sunday, 1 Apr 2018 CE
The Feast of Unleavened Bread begins on Monday, 2 Apr 2018 CE
and ends on Sunday, 8 Apr 2018 CE
The Wave Offering (the First-fruit) is Sunday, 8 Apr 2018 CE
First-fruits (Pentecost) is Sunday, 27 May 2018 CE
Date Sunset Moonset Illum. Sun's [Moon's at Sunset] Sun's Visib Visible?
(Evening) % Azimuth Azimuth Altitude Alt(M) Number
9 Sep 5:53 5:58 0.10 96.08 100.1 0.21 -1.10 8.447 Not Visible
10 Sep 5:52 6:38 1.32 95.64 89.00 8.75 -9.77 105.1 Prob Visible
The following Holy Days could be one day later:
The Day of Trumpets is Tuesday, 11 Sep 2018 CE
The Day of Atonement is Thursday, 20 Sep 2018 CE
The Feast of Tabernacles (Ingathering) begins on Tuesday, 25 Sep 2018 CE
and ends on Monday, 1 Oct 2018 CE
The Last Great Day is Tuesday, 2 Oct 2018 CE
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Now here is the non Biblical calculated Rabbinical calendar for those two years.
Rabbinical Holy Days are:
Passover preparation day is MON,10 APR
2017
Feast of Unleavened Bread starts TUE,11 APR 2017
and runs through MON,17 APR 2017
(Wave Offering) is WED,12 APR 2017
Pentecost is WED,31 MAY 2017
Feast of Trumpets is THU,21 SEP 2017
Day of Atonement is SAB,30 SEP 2017
Feast of Tabernacles starts THU,05 OCT 2017
and runs through WED,11 OCT 2017
Last Great Day is THU,12 OCT 2017
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Passover preparation day is FRI,30 MAR
2018
Feast of Unleavened Bread starts SAB,31 MAR 2018
and runs through FRI,06 APR 2018
(Wave Offering) is SUN,01 APR 2018
Pentecost is SUN,20 MAY 2018
Feast of Trumpets is MON,10 SEP 2018
Day of Atonement is WED,19 SEP 2018
Feast of Tabernacles starts MON,24 SEP 2018
and runs through SUN,30 SEP 2018
Last Great Day is MON,01 OCT 2018
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And then we have the so called Easter Calendar that is also not Biblical.
'Good Friday' is 14 April, 2017 Easter Sunday is 16 April, 2017
'Good Friday' is 30 March, 2018 Easter Sunday is 01 April, 2018
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So I guess it's all about how you go about figuring out the proper date as to when you are going to celebrate Passover.
But really it doesn't matter so much any more as to when.
1 Corinthians 11:24-26 and when he had given thanks, he broke it and said, "This is my body that is for you. Do this in remembrance of me." 25 In the same way he took the cup also, after supper, saying, "This cup is the new covenant in my blood. Do this, as often as you drink it, in remembrance of me." 26 For as often as you eat this bread and drink the cup, you proclaim the Lord's death until he comes. NRS