How do use JSL to convert seconds since January 1, 1970 to HH:MM:SS days, months and years？

[#1]

Hello!

1652335737

to

2022/05/12 14:08:57

Thanks!

[#2]

[#3]

OK

[#4 · Accepted solution]

The formula to make the modification is:

1652335737 + Informat( "01/01/1970", "mm/dd/yyyy" ) + In Hours( 8 )

The addition of the 8 hours in the calculation, is that apparently the start time for the 01/01/1970 is 08:00:00

This JSL displays the new calculated value from the formula

Show( Format( 1652335737 + Informat( "01/01/1970", "mm/dd/yyyy" ) + In Hours( 8 ), "yyyy-mm-ddThh:mm:ss" ) );

Format(1652335737 + Informat("01/01/1970", "mm/dd/yyyy") + In Hours(8), "yyyy-mm-ddThh:mm:ss") = "2022-05-12T14:08:57";

[#5]

How do  reverse this calculation?
For example, calculate the date 20230214 into seconds

Thanks!

In Days( Informat( Char( 20230214 ) ) -In Hours( 8 ) ) - In Days( 1jan1970 )

？？

1676304000000

[#6]

Names Default To Here( 1 );
date = "20230214";

// The JMP time values are based upon the number of seconds
// since January 1, 1904, therefore the calculation to the 
// number of seconds since then would be
JMPDate = Date MDY( num(substr(date,5,2)), num(substr(date,7,2)), num(substr(date, 1, 4)));
show(JMPDate, format(JMPDate,"m/d/y"));

// To convert this to the number of seconds since January 1, 1970
Jan1970Date = JMPDate - informat("01/01/1970", "m/d/y");
show(Jan1970Date);