Wondering if there is an easy way to get accurate Epoch time (seconds since 1/1/1970) when inputting a specific date (NOT current date) in AppleScript format (example: “Friday, December 6, 2019 at 11:45:02 AM”).

I’ve really hodge-podged something together but the results are not matching www.epochconverter.com’s results for the same date/time. Results are off by about 16 hrs 9 mins (10hrs 9mins with time zone offset):

```
use AppleScript version "2.4" -- Yosemite (10.10) or later
use framework "Foundation"
use scripting additions
on run
set itsDate to date "Friday, December 6, 2019 at 11:45:02 AM"
set newDate to its makeNSDateFrom:(itsDate)
set itsComps to its makeASDateFrom:newDate
set itsYear to itsComps's |year|()
set itsMonth to itsComps's |month|()
set itsDay to itsComps's |day|()
set itsTime to (itsComps's hour()) * hours + (itsComps's minute()) * minutes + (itsComps's |second|())
set yearDiff to itsYear - 1970
set unixTime to ((yearDiff * 31556926) + ((itsMonth - 1) * 2629743) + ((itsDay - 1) * 86400) + itsTime) as string
set timeString to number_to_string(unixTime)
end run
on makeNSDateFrom:theASDate
set {theYear, theMonth, theDay, theSeconds} to theASDate's {year, month, day, time}
if theYear < 0 then set theYear to -theYear
set theCalendar to current application's NSCalendar's currentCalendar()
set newDate to theCalendar's dateWithEra:(theYear ≥ 0) |year|:theYear |month|:(theMonth as integer) |day|:theDay hour:0 minute:0 |second|:theSeconds nanosecond:0
return newDate
end makeNSDateFrom:
on makeASDateFrom:theNSDate
set theCalendar to current application's NSCalendar's currentCalendar()
set comps to theCalendar's componentsInTimeZone:(missing value) fromDate:theNSDate
tell (current date) to set {theASDate, year, day, its month, day, time} to ¬
{it, comps's |year|(), 1, comps's |month|(), comps's |day|(), (comps's hour()) * hours + (comps's minute()) * minutes + (comps's |second|())}
return comps
end makeASDateFrom:
on number_to_string(this_number)
set this_number to this_number as string
if this_number contains "E+" then
set x to the offset of "." in this_number
set y to the offset of "+" in this_number
set z to the offset of "E" in this_number
set the decimal_adjust to characters (y - (length of this_number)) thru ¬
-1 of this_number as string as number
if x is not 0 then
set the first_part to characters 1 thru (x - 1) of this_number as string
else
set the first_part to ""
end if
set the second_part to characters (x + 1) thru (z - 1) of this_number as string
set the converted_number to the first_part
repeat with i from 1 to the decimal_adjust
try
set the converted_number to ¬
the converted_number & character i of the second_part
on error
set the converted_number to the converted_number & "0"
end try
end repeat
return the converted_number
else
if this_number contains "E-" then
set x to the offset of "." in this_number
set y to the offset of "-" in this_number
set z to the offset of "E" in this_number
if x is not 0 then
set the first_part to text 1 thru (x - 1) of this_number
else
set the first_part to ""
end if
set the second_part to text (x + 1) thru (z - 1) of this_number
set the converted_number to the first_part & second_part
set n to text (y + 1) thru -1 of this_number as number
set zero to "0."
if n > 1 then
repeat (n - 1) times
set zero to zero & "0"
end repeat
end if
set converted_number to zero & converted_number
else
set converted_number to this_number
end if
end if
return converted_number
end number_to_string
```