Look at the chart below again.
|
Sunday |
Monday |
Tuesday |
Wednesday |
Thursday |
Friday |
Saturday |
|
1 Begin Counting |
2 |
3 |
4 |
5 |
6 |
7 |
|
8 |
9 |
10 |
11 |
12 |
13 |
14 |
|
15 |
16 |
17 |
18 |
19 |
20 |
21 |
|
22 |
23 |
24 |
25 |
26 |
27 |
28 |
|
29 Next period |
30 |
This is a chart of a 28-day cycle. Notice that I have left the next period on the 29th. This is to demonstrate that counting from day 1 of your bleeding period up to and including the day of your next period is not correct. Count them for yourself and see. You should have came up with 29. This is not a 29-day cycle.
Speaking mathematically:
When you want to find the distance between two objects, you do not include both starting and ending points. You only include one or the other.
Look at this example:
You have a date on Saturday and someone asks you how many days until your date. (Imagine that today is Monday)
Answer: 5 days
Most of you probably started with Tuesday and then proceeded until Saturday. A few of you may have counted Monday and went to Friday (you still come up with the same figure though).
Now use the method of counting the starting point and the ending point:
How many days do you get now?
Answer: 6 days
By this calculation, you would miss your date because you would think that it was on Sunday.