# libSceRtc technical debt

### Unknown function info

- [sceRtcParseDateTime](../../../core/libs/prx/libSceRtc/Export.cpp) (libSceRtc) - the console's zone name table is only known from the names measured on PS5 firmware 13.60 and 13.42; any other name is assumed to take the military letter offset of its first character, as every measured name outside the table does (`HST`, `MSK`, `XYZ`), so a name the console's table holds but nobody measured gets the wrong offset
- [sceRtcFormatRFC2822, sceRtcFormatRFC2822LocalTime, sceRtcFormatRFC3339LocalTime](../../../core/libs/prx/libSceRtc/Export.cpp) (libSceRtc) - only shadPS4 (PS4) has bodies. A null tick returns `INVALID_POINTER` like the existing `sceRtcFormatRFC3339`, where shadPS4 formats the current time instead; offsets outside ±1439 minutes return `INVALID_VALUE` like `sceRtcFormatRFC3339`; the local-time variants use the host's offset at the given instant (shadPS4 uses `sceKernelGettimezone`, the current offset)
- [sceRtcGetDosTime, sceRtcSetDosTime](../../../core/libs/prx/libSceRtc/Export.cpp) (libSceRtc) - bit layout from shadPS4 (PS4, the standard FAT date/time). A year outside 1980-2107 makes `GetDosTime` return `INVALID_YEAR` after writing 0 for an earlier one and `0xff9fbf7d` (2107-12-31 23:59:58, the largest encodable time) for a later one, and `SetDosTime` decodes the year as the unsigned 7-bit FAT field (1980-2107) without validating the fields, as the disassembly-derived [fpPS4](https://github.com/red-prig/fpPS4) reimplementation of the PS4 library does; not confirmed on a PS5 title, and shadPS4 instead masks out-of-range years into the packed value and sign-extends the 16-bit date