4/17/2023 0 Comments Typeit4me date math issue![]() I mean March-July and August-December both match it exactly and then January is again +1 so it is like the first element of the next cycle. Probably the way to come up with this idea was to notice that the year (except for February) follows the following 5-month-cycle And it appears that the value (3*month - 2)/5 However, if the value of the current instance is MinValue, the method returns 0. The ToOADate method throws an OverflowException if the current instance represents a date that is later than MaxValue and earlier than midnight on January1, 0100. So what we need now is some formula that would match that distribution of +1 and +0. The maximum OLE Automation Date is the same as DateTime.MaxValue, the last moment of 31 December 9999. We only care about this +1 day since the next month after that! We don't care about February as there are no months after it (we cared about that before). Because the value of a is not the same is the previously defined startDate it's possible to get a wrong value. And now when we moved the February to its last position, all the month in the middle of the year have either 30 or 31 day. var startDate new Date ('T11:00:00') var a new Date () a.setDate (startDate.getDate () + 14) This will update the 'date' value for startDate with 14 days based on the value of a. I don't know the logic how it was got (I only have a guess at the end) but I can say why it works. Now let's remove the bits that are irrelevant when we subtract two values and get this value for month 30*month + (3*month - 2)/5 ![]() The 365*year + year/4 - year/100 beat is just handling the leap years. TypeIt4Me can work with dates and times as variables in an abbreviationwhen you type the abbreviation, TypeIt4Me inserts the current date and time. Actually this is how this calendar was originally designed which you still can see in the names of some month like October or December (you probably hear that Oct = 8 and Dec = 10). Is used to effectively start the year from March moving the highly irregular February to the end. Certainly Excel is the right tool for calculations, budgets, and accounting. ![]() If month number less than 3, year-=1 and month+=12 Programs are approximately 20 minutes long are listed by date and topic. If the first operand is a time, the second operand must be a time, a time duration, a string representation of a time, or a labeled duration of hours, minutes, or seconds. This is not a full answer but it is some explanation. If the second operand is a date, the first operand must be a date, a timestamp, a string representation of a date, or a string representation of a timestamp.
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