Produced by @SufficientStats using the Riot API.
Note that the date and hour are provided in EDT (-4).

"date","hour","est_games","cnt"
"2015-04-08",8,202662,934
"2015-04-08",9,203691,1256
"2015-04-08",10,344651,1656
"2015-04-08",11,25155,2099
"2015-04-08",12,44550,2539
"2015-04-08",13,44956,2984
"2015-04-08",14,45560,3399
"2015-04-08",15,46434,3977
"2015-04-08",16,48414,4408
"2015-04-08",17,52910,4660
"2015-04-08",18,63051,4963
"2015-04-08",19,62974,5341
"2015-04-08",20,62498,5587
"2015-04-08",21,62215,5611
"2015-04-08",22,72690,5646
"2015-04-08",23,71607,5462
"2015-04-09",0,55774,4803
"2015-04-09",1,73108,4221
"2015-04-09",2,45109,3438
"2015-04-09",3,33625,2610
"2015-04-09",4,31408,1979
"2015-04-09",5,24696,1499
"2015-04-09",6,23634,1180
"2015-04-09",7,23723,1067
"2015-04-09",8,41219,1153
"2015-04-09",9,34649,1423
"2015-04-09",10,41953,1812
"2015-04-09",11,33254,2318
"2015-04-09",12,33965,2742
"2015-04-09",13,36163,3183
"2015-04-09",14,43861,3581
"2015-04-09",15,46213,4048
"2015-04-09",16,103018,4482
"2015-04-09",17,275061,4757
"2015-04-09",18,165116,4992
"2015-04-09",19,67482,5368
"2015-04-09",20,67022,5577
"2015-04-09",21,74223,5704
"2015-04-09",22,83804,5612
"2015-04-09",23,73231,5415
"2015-04-10",0,65432,4875
"2015-04-10",1,62329,4204
"2015-04-10",2,61201,3432
"2015-04-10",3,37413,2617
"2015-04-10",4,26519,2011
"2015-04-10",5,41949,1518
"2015-04-10",6,21088,1165
"2015-04-10",7,33354,1024
"2015-04-10",8,23912,1128
"2015-04-10",9,24597,1397
"2015-04-10",10,33285,1828
"2015-04-10",11,43776,2288
"2015-04-10",12,29280,2836
"2015-04-10",13,42719,3289
"2015-04-10",14,44155,3709
"2015-04-10",15,51529,4152
"2015-04-10",16,53757,4608
"2015-04-10",17,55339,4701
"2015-04-10",18,72885,4975
"2015-04-10",19,86034,5117
"2015-04-10",20,149149,5328
"2015-04-10",21,262917,5380
"2015-04-10",22,153981,5618
"2015-04-10",23,82617,5575
"2015-04-11",0,73522,5328
"2015-04-11",1,64331,4682
"2015-04-11",2,62354,3926
"2015-04-11",3,52025,3101
"2015-04-11",4,36279,2321
"2015-04-11",5,26161,1659
"2015-04-11",6,32061,1258
"2015-04-11",7,24169,1192
"2015-04-11",8,24581,1340
"2015-04-11",9,35485,1741
"2015-04-11",10,43804,2348
"2015-04-11",11,34632,2900
"2015-04-11",12,46120,3595
"2015-04-11",13,52597,4111
"2015-04-11",14,60328,4527
"2015-04-11",15,81185,4700
"2015-04-11",16,52398,4549
"2015-04-11",17,74114,4586
"2015-04-11",18,54211,4503
"2015-04-11",19,75139,4499
"2015-04-11",20,84866,4550
"2015-04-11",21,91061,5181
"2015-04-11",22,212776,5625
"2015-04-11",23,270552,5627
"2015-04-12",0,133007,5287
"2015-04-12",1,63673,4811
"2015-04-12",2,70950,4059
"2015-04-12",3,44687,3286
"2015-04-12",4,35802,2507
"2015-04-12",5,40467,1821
"2015-04-12",6,19321,1326
"2015-04-12",7,31218,1219
"2015-04-12",8,24531,1305
"2015-04-12",9,33076,1651
"2015-04-12",10,30862,2166
"2015-04-12",11,27499,2760
"2015-04-12",12,51784,3369
"2015-04-12",13,52139,4041
"2015-04-12",14,53768,4423
"2015-04-12",15,64620,4681
"2015-04-12",16,62885,4692
"2015-04-12",17,55680,4730
"2015-04-12",18,64887,4736
"2015-04-12",19,71173,4939
"2015-04-12",20,73202,5162
"2015-04-12",21,84283,5363
"2015-04-12",22,71853,5286
"2015-04-12",23,71070,4853
"2015-04-13",0,63894,4225
"2015-04-13",1,51895,3590
"2015-04-13",2,33330,2863
"2015-04-13",3,46060,2236
"2015-04-13",4,71525,1747
"2015-04-13",5,29441,1362
"2015-04-13",6,43104,1097
"2015-04-13",7,51615,1021
"2015-04-13",8,28892,1081
"2015-04-13",9,83943,1306
"2015-04-13",10,123396,1615
"2015-04-13",11,60986,1909
"2015-04-13",12,114709,2271
"2015-04-13",13,45894,2566
"2015-04-13",14,45811,2986
"2015-04-13",15,83489,3541
"2015-04-13",16,95477,4195
"2015-04-13",17,46077,4586
"2015-04-13",18,57169,5076
"2015-04-13",19,71027,5482
"2015-04-13",20,55890,5779
"2015-04-13",21,65649,5889
"2015-04-13",22,71962,5654
"2015-04-13",23,54397,5282
"2015-04-14",0,53031,4653
"2015-04-14",1,44576,3906
"2015-04-14",2,36789,3106
"2015-04-14",3,42000,2332
"2015-04-14",4,34454,1727
"2015-04-14",5,33652,1362
"2015-04-14",6,31855,1044
"2015-04-14",7,18131,970
"2015-04-14",8,23554,1092
"2015-04-14",9,33054,1240
"2015-04-14",10,24117,1548
"2015-04-14",11,34465,1917
"2015-04-14",12,25362,2250
"2015-04-14",13,34695,2570
"2015-04-14",14,26846,2929
"2015-04-14",15,42249,3437
"2015-04-14",16,44019,3994
"2015-04-14",17,54953,4288
"2015-04-14",18,46496,4673
"2015-04-14",19,61041,5200
"2015-04-14",20,54629,5464
"2015-04-14",21,84534,5408
"2015-04-14",22,83981,5373
"2015-04-14",23,143535,5092
"2015-04-15",0,201815,4480
"2015-04-15",1,152054,3723
"2015-04-15",2,91468,3037
"2015-04-15",3,55521,2285
"2015-04-15",4,34953,1709
"2015-04-15",5,43096,1282
"2015-04-15",6,19087,1011
"2015-04-15",7,53013,927
"2015-04-15",8,63084,1008
"2015-04-15",9,19334,1234
"2015-04-15",10,40129,1526
"2015-04-15",11,20652,1835
"2015-04-15",12,31437,2136
"2015-04-15",13,30677,2525
"2015-04-15",14,35134,2841
"2015-04-15",15,33796,3407
"2015-04-15",16,35641,3864
"2015-04-15",17,60855,4189
"2015-04-15",18,52210,4562
"2015-04-15",19,53704,4858
"2015-04-15",20,51393,5106
"2015-04-15",21,71511,5257
"2015-04-15",22,61380,5144
"2015-04-15",23,61559,4769
"2015-04-16",0,63283,4311
"2015-04-16",1,45099,3598
"2015-04-16",2,42317,2990
"2015-04-16",3,26569,2234
"2015-04-16",4,33219,1691
"2015-04-16",5,23587,1278
"2015-04-16",6,16857,1020
"2015-04-16",7,31736,940
"2015-04-16",8,23258,998
"2015-04-16",9,23885,1213
"2015-04-16",10,24210,1503
"2015-04-16",11,31398,1821
"2015-04-16",12,26020,2152
"2015-04-16",13,32897,2432
"2015-04-16",14,26901,2809
"2015-04-16",15,37406,3359
"2015-04-16",16,45902,3845
"2015-04-16",17,58476,4169
"2015-04-16",18,51823,4447
"2015-04-16",19,70902,4888
"2015-04-16",20,71404,5160
"2015-04-16",21,232261,5115
"2015-04-16",22,167280,5099
"2015-04-16",23,105761,4671
"2015-04-17",0,92079,4212
"2015-04-17",1,54415,3673
"2015-04-17",2,52649,2962
"2015-04-17",3,34918,2316
"2015-04-17",4,32494,1721
"2015-04-17",5,23720,1285
"2015-04-17",6,23111,1030
"2015-04-17",7,23342,920
"2015-04-17",8,23394,964
"2015-04-17",9,32758,1231
"2015-04-17",10,24970,1584
"2015-04-17",11,35053,1928
"2015-04-17",12,26072,2275
"2015-04-17",13,41568,2612
"2015-04-17",14,46792,2957
"2015-04-17",15,54362,3375
"2015-04-17",16,46569,3721
"2015-04-17",17,52495,3959
"2015-04-17",18,48039,4047
"2015-04-17",19,71135,4302
"2015-04-17",20,65205,4450
"2015-04-17",21,70523,4661
"2015-04-17",22,58040,4819
"2015-04-17",23,81836,4833
"2015-04-18",0,63427,4482
"2015-04-18",1,55073,4037
"2015-04-18",2,62351,3395
"2015-04-18",3,41632,2713
"2015-04-18",4,27970,2023
"2015-04-18",5,44679,1494
"2015-04-18",6,24327,1153
"2015-04-18",7,43984,1063
"2015-04-18",8,23538,1251
"2015-04-18",9,44680,1607
"2015-04-18",10,25598,2169
"2015-04-18",11,77024,2646
"2015-04-18",12,118074,3078
"2015-04-18",13,110210,3537
"2015-04-18",14,151952,3850
"2015-04-18",15,100351,4030
"2015-04-18",16,71523,4005
"2015-04-18",17,82645,4040
"2015-04-18",18,52738,3999
"2015-04-18",19,63314,4029
"2015-04-18",20,74525,3989
"2015-04-18",21,75268,4432
"2015-04-18",22,67807,4578
"2015-04-18",23,69422,4619
"2015-04-19",0,76596,4387
"2015-04-19",1,74403,4061
"2015-04-19",2,51269,3383
"2015-04-19",3,47328,2725
"2015-04-19",4,55613,2040
"2015-04-19",5,23373,1512
"2015-04-19",6,42435,1178
"2015-04-19",7,21577,1036
"2015-04-19",8,33554,1170
"2015-04-19",9,25284,1477
"2015-04-19",10,43902,2026
"2015-04-19",11,37084,2346
"2015-04-19",12,41561,2896
"2015-04-19",13,60732,3434
"2015-04-19",14,61700,3748
"2015-04-19",15,48848,3856
"2015-04-19",16,53947,3849
"2015-04-19",17,73939,3959
"2015-04-19",18,113633,3947
"2015-04-19",19,183904,3961
"2015-04-19",20,165098,4609
"2015-04-19",21,142936,4553
"2015-04-19",22,74435,4522
"2015-04-19",23,62418,4160
"2015-04-20",0,52900,3610
"2015-04-20",1,54284,3119
"2015-04-20",2,52577,2506
"2015-04-20",3,35782,1906
"2015-04-20",4,44304,1517
"2015-04-20",5,23633,1188
"2015-04-20",6,32351,940
"2015-04-20",7,17917,837
"2015-04-20",8,23621,930
"2015-04-20",9,32812,1099
"2015-04-20",10,24915,1350
"2015-04-20",11,33078,1656
"2015-04-20",12,25746,1970
"2015-04-20",13,33475,2217
"2015-04-20",14,30812,2546
"2015-04-20",15,38079,3046
"2015-04-20",16,48017,3486
"2015-04-20",17,48212,3797
"2015-04-20",18,71334,4082
"2015-04-20",19,53137,4366
"2015-04-20",20,83816,4655
"2015-04-20",21,65231,4627
"2015-04-20",22,74114,4428
"2015-04-20",23,56214,4196
"2015-04-21",0,48126,3680
"2015-04-21",1,60730,3145
"2015-04-21",2,28143,2551
"2015-04-21",3,40168,1884
"2015-04-21",4,24311,1486
"2015-04-21",5,23820,1135
"2015-04-21",6,23371,888
"2015-04-21",7,31820,849
"2015-04-21",8,17287,882
"2015-04-21",9,24345,1049
"2015-04-21",10,32911,1275
"2015-04-21",11,25854,1632
"2015-04-21",12,62200,1897
"2015-04-21",13,66142,2184
"2015-04-21",14,65914,2482
"2015-04-21",15,116234,2914
"2015-04-21",16,97635,3325
"2015-04-21",17,108541,3594
"2015-04-21",18,163103,3897
"2015-04-21",19,112209,4293
"2015-04-21",20,55980,4396
"2015-04-21",21,64276,4409
"2015-04-21",22,66862,4391
"2015-04-21",23,80278,4019
"2015-04-22",0,49808,3590
"2015-04-22",1,51729,3099
"2015-04-22",2,34400,2457
"2015-04-22",3,34801,1919
"2015-04-22",4,25338,1432
"2015-04-22",5,24536,1057
"2015-04-22",6,23273,801
"2015-04-22",7,33124,770
"2015-04-22",8,18932,854
"2015-04-22",9,24362,996
"2015-04-22",10,33225,1260
"2015-04-22",11,25370,1508
"2015-04-22",12,33748,1814
"2015-04-22",13,33078,2054
"2015-04-22",14,32890,2398
"2015-04-22",15,42145,2746
"2015-04-22",16,43391,3165
"2015-04-22",17,72991,3465
"2015-04-22",18,58040,3737
"2015-04-22",19,70617,3918
"2015-04-22",20,53313,4233
"2015-04-22",21,74168,4206
"2015-04-22",22,56286,4156
"2015-04-22",23,63948,3892
"2015-04-23",0,114055,3403
"2015-04-23",1,115291,2804
"2015-04-23",2,102797,2329
"2015-04-23",3,76919,1811
"2015-04-23",4,45349,1388
"2015-04-23",5,53946,1046
"2015-04-23",6,53588,795
"2015-04-23",7,72167,776
"2015-04-23",8,29536,827
"2015-04-23",9,82276,956
"2015-04-23",10,74807,1219
"2015-04-23",11,73770,1438
"2015-04-23",12,65414,1728
"2015-04-23",13,75556,1979
"2015-04-23",14,61170,2232
"2015-04-23",15,53755,2651
"2015-04-23",16,44940,3010
"2015-04-23",17,46537,3165
"2015-04-23",18,53451,3478
"2015-04-23",19,64668,3770
"2015-04-23",20,81062,3945
"2015-04-23",21,65372,3867
"2015-04-23",22,56291,3865
"2015-04-23",23,64563,3626
"2015-04-24",0,53477,3165
"2015-04-24",1,45651,2757
"2015-04-24",2,41566,2219
"2015-04-24",3,47643,1742
"2015-04-24",4,53152,1297
"2015-04-24",5,20413,283
"2015-04-24",6,22625,316
"2015-04-24",7,32945,569
"2015-04-24",8,22607,683
"2015-04-24",9,43633,848
"2015-04-24",10,24738,1115
"2015-04-24",11,45017,1417
"2015-04-24",12,37282,1727
"2015-04-24",13,57203,1929
"2015-04-24",14,46277,2232
"2015-04-24",15,47113,2481
"2015-04-24",16,47821,2853
"2015-04-24",17,52653,2995
"2015-04-24",18,63581,3205
"2015-04-24",19,53153,3351
"2015-04-24",20,143460,3452
"2015-04-24",21,164929,3521
"2015-04-24",22,196656,3837
"2015-04-24",23,114131,3748
"2015-04-25",0,71328,3451
"2015-04-25",1,63636,3105
"2015-04-25",2,48268,2571
"2015-04-25",3,46603,1950
"2015-04-25",4,54245,1518
"2015-04-25",5,22716,1148
"2015-04-25",6,24106,896
"2015-04-25",7,34085,755
"2015-04-25",8,24651,886
"2015-04-25",9,34739,1186
"2015-04-25",10,43856,1563
"2015-04-25",11,38512,2046
"2015-04-25",12,55492,2473
"2015-04-25",13,62403,2874
"2015-04-25",14,54624,3134
"2015-04-25",15,54797,3339
"2015-04-25",16,54262,3370
"2015-04-25",17,83865,3328
"2015-04-25",18,52594,3315
"2015-04-25",19,72438,3261
"2015-04-25",20,66110,3367
"2015-04-25",21,64528,3358
"2015-04-25",22,83703,3312
"2015-04-25",23,107025,3388
"2015-04-26",0,135846,3252
"2015-04-26",1,191773,2876
"2015-04-26",2,109027,2459
"2015-04-26",3,54004,1919
"2015-04-26",4,73708,1437
"2015-04-26",5,71286,1064
"2015-04-26",6,34175,807
"2015-04-26",7,23889,725
"2015-04-26",8,41535,757
"2015-04-26",9,35393,970
"2015-04-26",10,44469,1362
"2015-04-26",11,40766,1846
"2015-04-26",12,41931,2217
"2015-04-26",13,43084,2499
"2015-04-26",14,63436,2820
"2015-04-26",15,49237,2950
"2015-04-26",16,71564,3098
"2015-04-26",17,52082,3045
"2015-04-26",18,72754,3130
"2015-04-26",19,62518,3135
"2015-04-26",20,73460,3068
"2015-04-26",21,65478,3049
"2015-04-26",22,63521,3018
"2015-04-26",23,64415,2790
"2015-04-27",0,53954,2500
"2015-04-27",1,49071,2094
"2015-04-27",2,46248,1714
"2015-04-27",3,35240,1337
"2015-04-27",4,24615,1032
"2015-04-27",5,24025,774
"2015-04-27",6,30992,596
"2015-04-27",7,20398,516
"2015-04-27",8,33272,547
"2015-04-27",9,41905,667
"2015-04-27",10,21488,834
"2015-04-27",11,52461,985
"2015-04-27",12,23372,1224
"2015-04-27",13,43741,1385
"2015-04-27",14,54886,1627
"2015-04-27",15,67584,1911
"2015-04-27",16,94086,2219
"2015-04-27",17,190864,2356
"2015-04-27",18,128165,2499
"2015-04-27",19,124042,2774
"2015-04-27",20,112592,2857
"2015-04-27",21,73540,2813
"2015-04-27",22,62578,2718
"2015-04-27",23,65128,2609
"2015-04-28",0,63789,2355
"2015-04-28",1,46165,1966
"2015-04-28",2,43107,1536
"2015-04-28",3,33225,1235
"2015-04-28",4,31397,893
"2015-04-28",5,23715,685
"2015-04-28",6,23472,493
"2015-04-28",7,23421,455
"2015-04-28",8,23688,512
"2015-04-28",9,23792,615
"2015-04-28",10,25512,746
"2015-04-28",11,41745,900
"2015-04-28",12,26100,1050
"2015-04-28",13,36669,1251
"2015-04-28",14,43458,1462
"2015-04-28",15,46580,1596
"2015-04-28",16,60601,1848
"2015-04-28",17,47636,1944
"2015-04-28",18,60173,2154
"2015-04-28",19,62948,2284
"2015-04-28",20,55998,2329
"2015-04-28",21,71880,2275
"2015-04-28",22,75244,2311
"2015-04-28",23,74849,2115
"2015-04-29",0,152854,1940
"2015-04-29",1,164172,1643
"2015-04-29",2,132654,1331
"2015-04-29",3,72267,1005
"2015-04-29",4,43721,424