Time and Date Calculations

[Martin X. Moleski, SJ]

In trying to put together a table of message traffic to and from Lae, I've discovered that I cannot reliably calculate times and dates in my head.

I've tried to assemble some information about timezones in an article on the wiki.

I would appreciate some feedback about whether my description of the issues involved and whether my derived tables are correct.

Thanks.

[Ric Gillespie]

This is a cheat-sheet I've used for years.

[Martin X. Moleski, SJ]

This is a cheat-sheet I've used for years.

Thanks, Ric!

I think I've reproduced it in a spreadsheet. 

[Ric Gillespie]

Looks good.  Should help.

[Martin X. Moleski, SJ]

Looks good.  Should help.

It's a lot safer than me doing time operations in my head.  :-\

I've done a wiki table of the same, with links to two .pdf versions.

[Irvine John Donald]

Thank You Marty and Ric.  That's much easier to work with.

[Gary LaPook]

In trying to put together a table of message traffic to and from Lae, I've discovered that I cannot reliably calculate times and dates in my head.

I've tried to assemble some information about timezones in an article on the wiki.

I would appreciate some feedback about whether my description of the issues involved and whether my derived tables are correct.

Thanks.

Also take a look at my old post here.

gl

[Gary LaPook]

In trying to put together a table of message traffic to and from Lae, I've discovered that I cannot reliably calculate times and dates in my head.

I've tried to assemble some information about timezones in an article on the wiki.

I would appreciate some feedback about whether my description of the issues involved and whether my derived tables are correct.

Thanks.

The sign convention is that used by navigators and the Navy since they are interested in finding GMT, also known as GCT, UTC and Z (Zulu time), starting from the local time shown on the onboard clocks.

gl

[Martin X. Moleski, SJ]

The sign convention is that used by navigators and the Navy since they are interested in finding GMT, also known as GCT, UTC and Z (Zulu time), starting from the local time shown on the onboard clocks.

Thanks--that explains it! I've added a footnote.