Bold call! Hope it pans out for you!
P.S. In case you're curious what the historical back-check looks like for 831, here it is:
02/20/2016; 643;746 | 11/10/2006; 646;047 | 02/15/2005; 336;525 | 08/21/2001; 758;643
02/21/2016; 297;501 | 11/11/2006; 234;528 | 02/16/2005; 312;493 | 08/22/2001; 002;010
02/22/2016; 659;921 | 11/13/2006; 316;500 | 02/17/2005; 373;546 | 08/23/2001; 267;709
02/23/2016; 284;864 | 11/14/2006; 792;166 | 02/18/2005; 281;810 | 08/24/2001; 423;026
02/24/2016; 785;043 | 11/15/2006; 962;204 | 02/19/2005; 769;743 | 08/25/2001; 720;591
02/25/2016; 141;353 | 11/16/2006; 254;707 | 02/21/2005; 223;085 | 08/27/2001; 405;445
02/26/2016; 471;638 | 11/17/2006; 619;281 | 02/22/2005; 161;694 | 08/28/2001; 616;295
02/27/2016; 016;470 | 11/18/2006; 271;477 | 02/23/2005; 358;888 | 08/29/2001; 990;755
02/28/2016; 925;606 | 11/20/2006; 382;116 | 02/24/2005; 499;685 | 08/30/2001; 343;292
02/29/2016; 050;408 | 11/21/2006; 200;155 | 02/25/2005; 078;225 | 08/31/2001; 364;971
03/01/2016; 340;236 | 11/22/2006; 274;786 | 02/26/2005; 036;678 | 09/01/2001; 007;118
03/02/2016; 732;018 | 11/23/2006; 520;207 | 02/28/2005; 589;478 | 09/03/2001; 811;098
03/03/2016; 562;423 | 11/24/2006; 993;962 | 03/01/2005; 509;025 | 09/04/2001; 697;269
03/04/2016; 074;012 | 11/25/2006; 762;517 | 03/02/2005; 074;675 | 09/05/2001; 870;958
03/05/2016; 213;993 | 11/27/2006; 703;658 | 03/03/2005; 889;688 | 09/06/2001; 865;790
03/06/2016; 838;314 | 11/28/2006; 424;354 | 03/04/2005; 674;652 | 09/07/2001; 680;567
03/07/2016; 429;168 | 11/29/2006; 168;353 | 03/05/2005; 461;108 | 09/08/2001; 137;948
03/08/2016; 447;195 | 11/30/2006; 390;212 | 03/07/2005; 378;359 | 09/10/2001; 002;807
03/09/2016; 636;877 | 12/01/2006; 821;617 | 03/08/2005; 719;447 | 09/11/2001; 255;230<-one day off, same column as 074
03/10/2016; 234;418 | 12/02/2006; 569;503 | 03/09/2005; 015;736 | 09/12/2001; 750;279
03/11/2016; 976;190 | 12/04/2006; 525;880 | 03/10/2005; 061;737 | 09/13/2001; 163;070
03/12/2016; 955;259 | 12/05/2006; 836;961 | 03/11/2005; 115;609 | 09/14/2001; 076;769
03/13/2016; 389;359 | 12/06/2006; 170;478 | 03/12/2005; 250;211 | 09/15/2001; 594;937
03/14/2016; 723;765 | 12/07/2006; 943;673 | 03/14/2005; 238;590 | 09/17/2001; 273;287
03/15/2016; 149;XXX | 12/08/2006; 770;831 | 03/15/2005; 324;831 | 09/18/2001; 831;502
You already saw the date workup:
03/15/2005; Day: 324; Night: 831