Hottest Day of the year

Station 2973 hottest day of each year. Y Axis is number of days since Jan 1. Some years will have more than one day share the same highest temp.How does AGW force the hottest day of the year further into the year as both the linear trend (dashed line) and the 10 year moving average show?

Number of hot days per month. Evenly spread between July and Aug.

Hottest day of 1952 was April 28. Then what did the rest of the summer look like? Quite flat shaped, not like a normal year with a crest around July:

What would cause this?

Hottest days of each year since 1900:

Year	MaxOfMax Temp	DayNumber	Date
1904	30.6	204	23-Jul-04
1905	28.9	152	02-Jun-05
1906	30.6	187	07-Jul-06
1908	31.7	206	25-Jul-08
1909	33.3	202	22-Jul-09
1910	32.2	176	26-Jun-10
1911	30.6	169	19-Jun-11
1912	32.2	173	22-Jun-12
1913	27.8	160	10-Jun-13
1913	27.8	161	11-Jun-13
1914	32.8	207	27-Jul-14
1914	32.8	208	28-Jul-14
1915	32.2	219	08-Aug-15
1916	28.9	213	01-Aug-16
1916	28.9	220	08-Aug-16
1917	30.6	265	23-Sep-17
1917	30.6	227	16-Aug-17
1918	33.9	164	14-Jun-18
1919	36.1	196	16-Jul-19
1920	33.3	198	17-Jul-20
1921	32.2	241	30-Aug-21
1922	35	213	02-Aug-22
1923	31.1	166	16-Jun-23
1924	33.3	187	06-Jul-24
1925	34.4	214	03-Aug-25
1926	28.9	235	24-Aug-26
1927	31.1	204	24-Jul-27
1928	32.2	222	10-Aug-28
1929	35	206	26-Jul-29
1930	35.6	235	24-Aug-30
1931	35.6	176	26-Jun-31
1932	32.2	231	19-Aug-32
1933	37.2	225	14-Aug-33
1934	33.3	214	03-Aug-34
1934	33.3	227	16-Aug-34
1934	33.3	145	26-May-34
1935	36.7	225	14-Aug-35
1936	34.4	191	10-Jul-36
1937	37.2	184	04-Jul-37
1937	37.2	185	05-Jul-37
1938	32.8	146	27-May-38
1938	32.8	191	11-Jul-38
1938	32.8	209	29-Jul-38
1939	35.6	191	11-Jul-39
1940	36.1	221	09-Aug-40
1941	41.1	199	19-Jul-41
1942	30.6	202	22-Jul-42
1943	35	187	07-Jul-43
1944	32.8	205	24-Jul-44
1945	34.4	228	17-Aug-45
1946	37.8	210	30-Jul-46
1947	35	208	28-Jul-47
1948	33.3	188	07-Jul-48
1948	33.3	242	30-Aug-48
1949	37.2	217	06-Aug-49
1950	36.7	207	27-Jul-50
1951	31.7	215	04-Aug-51
1952	32.2	118	28-Apr-52
1952	32.2	234	22-Aug-52
1952	32.2	237	25-Aug-52
1953	31.7	194	14-Jul-53
1954	32.8	200	20-Jul-54
1955	33.3	196	16-Jul-55
1955	33.3	198	18-Jul-55
1956	35	161	10-Jun-56
1957	33.9	206	26-Jul-57
1958	35.6	202	22-Jul-58
1959	35	204	24-Jul-59
1961	38.3	227	16-Aug-61
1962	33.3	176	26-Jun-62
1963	33.9	202	22-Jul-63
1964	32.8	193	12-Jul-64
1965	30.6	221	10-Aug-65
1966	32.2	196	16-Jul-66
1967	33.3	222	11-Aug-67
1967	33.3	246	04-Sep-67
1967	33.3	248	06-Sep-67
1968	30.6	170	19-Jun-68
1969	33.3	232	21-Aug-69
1970	32.8	219	08-Aug-70
1970	32.8	153	03-Jun-70
1970	32.8	218	07-Aug-70
1971	32.8	233	22-Aug-71
1971	32.8	217	06-Aug-71
1972	35	241	29-Aug-72
1973	32.2	224	13-Aug-73
1974	33.3	217	06-Aug-74
1974	33.3	199	19-Jul-74
1975	33.9	209	29-Jul-75
1976	32.2	235	23-Aug-76
1977	30	174	24-Jun-77
1978	33.9	221	10-Aug-78
1979	32.8	200	20-Jul-79
1980	32.8	191	10-Jul-80
1981	31	221	10-Aug-81
1981	31	251	09-Sep-81
1981	31	184	04-Jul-81
1981	31	183	03-Jul-81
1982	30	217	06-Aug-82
1982	30	245	03-Sep-82
1982	30	210	30-Jul-82
1983	35	242	31-Aug-83
1983	35	217	06-Aug-83
1984	36	208	27-Jul-84
1985	32	236	25-Aug-85
1985	32	185	05-Jul-85
1986	32.5	174	24-Jun-86
1986	32.5	147	28-May-86
1987	33	165	15-Jun-87
1987	33	207	27-Jul-87
1987	33	208	28-Jul-87
1988	40	157	06-Jun-88
1989	37	201	21-Jul-89
1990	34	217	06-Aug-90
1991	34	221	10-Aug-91
1991	34	242	31-Aug-91
1991	34	220	09-Aug-91
1992	32	226	14-Aug-92
1992	32	227	15-Aug-92
1993	31	171	21-Jun-93
1993	31	209	29-Jul-93
1994	30.5	208	28-Jul-94
1994	30.5	226	15-Aug-94
1995	32	149	30-May-95
1995	32	216	05-Aug-95
1996	33	242	30-Aug-96
1997	35.5	218	07-Aug-97
1998	35	217	06-Aug-98
1999	32.5	236	25-Aug-99
2000	31.5	235	23-Aug-00
2001	36	218	07-Aug-01
2002	34.5	198	18-Jul-02
2002	34.5	194	14-Jul-02
2003	36.5	227	16-Aug-03
2004	31	200	19-Jul-04
2004	31	198	17-Jul-04
2005	32.5	212	01-Aug-05
2006	32	179	29-Jun-06
2007	33.5	210	30-Jul-07
2008	35	237	25-Aug-08
2009	31	266	24-Sep-09
2009	31	164	14-Jun-09