For folks who follow Monthly Straight Repeats, 228 is a classic example. Here is the history:
01/12/2019,228,289
01/13/2019,665,976
01/14/2019,950,511
01/15/2019,908,707
01/16/2019,906,228
Not quite in the same calendar month, but close
01/24/2017,008,228
01/25/2017,308,180
01/26/2017,583,416
01/27/2017,301,030
01/28/2017,162,613
01/29/2017,443,237
01/30/2017,211,615
01/31/2017,989,282
02/01/2017,722,701
02/02/2017,882,074
02/03/2017,087,584
02/04/2017,522,553
02/05/2017,502,895
02/06/2017,287,140
02/07/2017,307,228
08/03/2012,952,228
08/04/2012,381,898
08/05/2012,236,122
08/06/2012,665,041
08/07/2012,565,072
08/08/2012,346,675
08/09/2012,465,910
08/10/2012,308,769
08/11/2012,296,581
08/12/2012,846,015
08/13/2012,546,274
08/14/2012,493,999
08/15/2012,899,459
08/16/2012,444,012
08/17/2012,969,228
06/07/2010,221,228
06/08/2010,348,601
06/09/2010,364,634
06/10/2010,211,760
06/11/2010,910,849
06/12/2010,602,127
06/13/2010,652,846
06/14/2010,295,248
06/15/2010,876,395
06/16/2010,086,895
06/17/2010,974,915
06/18/2010,238,140
06/19/2010,824,228
Again, not quite in the same calendar month, but close
01/15/1999,159,228
01/16/1999,193,398
01/18/1999,619,339
01/19/1999,646,775
01/20/1999,967,458
01/21/1999,151,242
01/22/1999,870,713
01/23/1999,353,314
01/25/1999,141,659
01/26/1999,623,167
01/27/1999,739,001
01/28/1999,592,069
01/29/1999,838,311
01/30/1999,375,109
02/01/1999,413,260
02/02/1999,228,093
It might be worth checking workups for 228, especially in a couple weeks, on the 17th, 19th and 20th, especially.