What you describe happens 86 times during the 400 year period from 1800-2200. Here are a list of dates for your reference:

Erev RH 1802 and YK 1803 are both on 9/26
Erev RH 1810 and YK 1811 are both on 9/28
Erev RH 1813 and YK 1814 are both on 9/24
Erev RH 1822 and YK 1823 are both on 9/15
Erev RH 1824 and YK 1825 are both on 9/22
Erev RH 1826 and YK 1827 are both on 10/1
Erev RH 1829 and YK 1830 are both on 9/27
Erev RH 1830 and YK 1831 are both on 9/17
Erev RH 1834 and YK 1835 are both on 10/3
Erev RH 1837 and YK 1838 are both on 9/29
Erev RH 1846 and YK 1847 are both on 9/20
Erev RH 1849 and YK 1850 are both on 9/16
Erev RH 1853 and YK 1854 are both on 10/2
Erev RH 1854 and YK 1855 are both on 9/22
Erev RH 1857 and YK 1858 are both on 9/18
Erev RH 1864 and YK 1865 are both on 9/30
Erev RH 1870 and YK 1871 are both on 9/25
Erev RH 1873 and YK 1874 are both on 9/21
Erev RH 1878 and YK 1879 are both on 9/27
Erev RH 1881 and YK 1882 are both on 9/23
Erev RH 1884 and YK 1885 are both on 9/19
Erev RH 1897 and YK 1898 are both on 9/26
Erev RH 1900 and YK 1901 are both on 9/23
Erev RH 1902 and YK 1903 are both on 10/1
Erev RH 1905 and YK 1906 are both on 9/29
Erev RH 1908 and YK 1909 are both on 9/25
Erev RH 1917 and YK 1918 are both on 9/16
Erev RH 1921 and YK 1922 are both on 10/2
Erev RH 1924 and YK 1925 are both on 9/28
Erev RH 1925 and YK 1926 are both on 9/18
Erev RH 1932 and YK 1933 are both on 9/30
Erev RH 1941 and YK 1942 are both on 9/21
Erev RH 1944 and YK 1945 are both on 9/17
Erev RH 1948 and YK 1949 are both on 10/3
Erev RH 1952 and YK 1953 are both on 9/19
Erev RH 1962 and YK 1963 are both on 9/28
Erev RH 1968 and YK 1969 are both on 9/22
Erev RH 1973 and YK 1974 are both on 9/26
Erev RH 1978 and YK 1979 are both on 10/1
Erev RH 1982 and YK 1983 are both on 9/17
Erev RH 1986 and YK 1987 are both on 10/3
Erev RH 1989 and YK 1990 are both on 9/29
Erev RH 1993 and YK 1994 are both on 9/15
Erev RH 1998 and YK 1999 are both on 9/20
Erev RH 2006 and YK 2007 are both on 9/22
Erev RH 2009 and YK 2010 are both on 9/18
Erev RH 2022 and YK 2023 are both on 9/25
Erev RH 2024 and YK 2025 are both on 10/2
Erev RH 2030 and YK 2031 are both on 9/27
Erev RH 2033 and YK 2034 are both on 9/23
Erev RH 2044 and YK 2045 are both on 9/21
Erev RH 2046 and YK 2047 are both on 9/30
Erev RH 2049 and YK 2050 are both on 9/26
Erev RH 2050 and YK 2051 are both on 9/16
Erev RH 2054 and YK 2055 are both on 10/2
Erev RH 2057 and YK 2058 are both on 9/28
Erev RH 2060 and YK 2061 are both on 9/24
Erev RH 2066 and YK 2067 are both on 9/19
Erev RH 2069 and YK 2070 are both on 9/15
Erev RH 2073 and YK 2074 are both on 10/1
Erev RH 2076 and YK 2077 are both on 9/27
Erev RH 2077 and YK 2078 are both on 9/17
Erev RH 2081 and YK 2082 are both on 10/3
Erev RH 2084 and YK 2085 are both on 9/29
Erev RH 2093 and YK 2094 are both on 9/20
Erev RH 2096 and YK 2097 are both on 9/16
Erev RH 2100 and YK 2101 are both on 10/3
Erev RH 2101 and YK 2102 are both on 9/23
Erev RH 2104 and YK 2105 are both on 9/19
Erev RH 2117 and YK 2118 are both on 9/26
Erev RH 2120 and YK 2121 are both on 9/22
Erev RH 2122 and YK 2123 are both on 9/30
Erev RH 2125 and YK 2126 are both on 9/28
Erev RH 2128 and YK 2129 are both on 9/24
Erev RH 2138 and YK 2139 are both on 10/3
Erev RH 2142 and YK 2143 are both on 9/19
Erev RH 2144 and YK 2145 are both on 9/27
Erev RH 2149 and YK 2150 are both on 10/1
Erev RH 2152 and YK 2153 are both on 9/29
Erev RH 2158 and YK 2159 are both on 9/22
Erev RH 2164 and YK 2165 are both on 9/16
Erev RH 2169 and YK 2170 are both on 9/20
Erev RH 2174 and YK 2175 are both on 9/25
Erev RH 2182 and YK 2183 are both on 9/27
Erev RH 2188 and YK 2189 are both on 9/21
Erev RH 2198 and YK 2199 are both on 9/30

If you'd like to get Parashat haShavuah according to date, you'll want to use our REST API. Here's an example API URL that you might use for getting just parsha, and no holidays:

http://www.hebcal.com/hebcal/?v=1&cfg=json&year=now&month=x&s=on

You could use the PHP curl library to fetch the JSON from our service, then PHP's json_decode function to parse the results.

Go to http://www.hebcal.com/hebcal/ and select a city for candle-lighting times.

Excellent suggestion!

We've made a change to our page - tell us what you think!

http://www.hebcal.com/holidays/2015

The short answer is that we recommend your second approach: delete the current and then download a new one.

Hebcal syncs with Google Calendar on yearly (Gregorian or Hebrew) boundaries. So it's not possible to keep the old calendar through a specific date in May and then a new calendar start immediately after.

Hope this helps.