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Diffstat (limited to 'TECH.md')
| -rw-r--r-- | TECH.md | 8 |
1 files changed, 8 insertions, 0 deletions
@@ -16,3 +16,11 @@ The implication (which is accurate) implies that `gmtime(t) == gmtime(mktime(loc As such, the source of truth is `time_t`, which is UTC-only. When we want to modify a `time_t`, we want to use localtime to perform the modification. + +`strftime` actually can handle a `gmtime`, but various platforms are buggy. +For example, macOS `%z %Z` will correctly report UTC but will report the localtime offset. +On Linux, the same format will correctly report an offset of exactly `+0000`, but claim to be in `GMT`. +As such, `%z` and `%Z` cannot be counted on. + +Ok, `%z` and `%Z` don't work correctly because `struct tm` is often extended. +When I convert to and from a dictionary, I lose that information. |