From the beginning of February, 2011 through the end of August, 2011 was 30 weeks and 1 day. From the beginning of January, 2011 through the end of September, 2011 was 38 weeks and 6 days.
63 weeks.
34 weeks and 6 days.
19 weeks (rounded down).
2012 was a leap year, so: from Sept 28 2011 to Sept 28 2012 is 366 days; and from Sept 28 2012 to Sept 28 2013 is 365 days; a total of 731 days. 7 days in a week, so: 731 days ÷ 7 days/week = 1043/7 weeks ie just under 1041/2 weeks.
Normally there are 25 weeks and 6 days between a 1st of September and a 1st of March. If the March is in a leap year, then there is exactly 26 weeks between the two dates.
As on December 5th 2009 the foetus is 10 weeks.
Sept 2010 to Sept 2011 is the year 5771. Sept 2011 to Sept 2012 is the year 5772.
Including the start and end dates in the calculation, there are 37420 days between the two dates.
2nd September, 3rd september, 5th sept, 7 sept and 11th sept 2011
1 Jan through 30 Sep is 39 weeks in an ordinary year and 39 weeks and one day in a leap year, so between 1 Jan and 30 Sep there are 38 weeks and five days in an ordinary year and 38 weeks and six days in a leap year.
29586 days.
246 days.