It is either after 5, 6 or 11 years, depending on how leap years affect days being skipped. The last time was in 2010. These are the coming years for the rest of the century that it will be on a Friday and as you can see the gaps are either 5, 6 or 11 years:
2010
2021
2027
2032
2038
2049
2055
2060
2066
2077
2083
2088
2094
2100
Every 11 years. October 1st falls on Friday this year and again in 2021 and 2032.
Friday.
Exactly 14% of all October 13th fall on Friday, the next one is in 2017.
October 1, will next fall on a Friday in 2021.
October 1 1976 was a Friday.
October 1, 1951 was on a Friday.
October 1 2010 is a Friday.
October 1 2010 was a Friday.
October 2004 was the last time 1 Oct was on a Friday.
October 1st 1999 was a Friday.
Friday.
FRiday