diff --git a/include/tlibc/errors.h b/include/tlibc/errors.h
index 66f7491..b229637 100755
--- a/include/tlibc/errors.h
+++ b/include/tlibc/errors.h
@@ -149,7 +149,8 @@ typedef struct Result_ {
     int _rname(N) = CALL;\
     if(_rname(N) != 0){\
         Error_printAndExit(Error_create(\
-            strerror_malloc(_rname(N)), true, ErrorCallPos_here(), \
+            str_from_cstr(strerror_malloc(_rname(N))), true, \
+            ErrorCallPos_here(), \
             ErrorCodePage_name(LIBC_ERRNO), _rname(N)\
         ));\
     }\
diff --git a/include/tlibc/time.h b/include/tlibc/time.h
index 0b6777e..ec6e4d3 100644
--- a/include/tlibc/time.h
+++ b/include/tlibc/time.h
@@ -4,7 +4,7 @@
 extern "C" {
 #endif
 
-#include "std.h"
+#include "errors.h"
 
 /// nanoseconds
 typedef u64 nsec_t;
@@ -52,10 +52,15 @@ void DateTime_get(DateTime* dt, bool utc_time);
 static inline void DateTime_getLocal(DateTime* dt) { DateTime_get(dt, false); }
 static inline void DateTime_getUTC(DateTime* dt) { DateTime_get(dt, true); }
 
-// yyyy.MM.dd_HH-mm-ss
+/// yyyy.MM.dd HH:mm:ss_float
+Result(void) DateTime_parse(cstr src, DateTime* dt);
+
+/// yyyy.MM.dd_HH-mm-ss
 #define FMT_DateTime_fileName "%04i.%02i.%02i_%02i-%02i-%02i"
-// yyyy.MM.dd HH:mm:ss
-#define FMT_DateTime_text "%04i.%02i.%02i %02i:%02i:%02i"
+/// yyyy.MM.dd HH:mm:ss
+/// yyyy.MM.dd HH:mm:ss_float
+#define FMT_DateTime_text "%04i.%02i.%02i-%02i:%02i:%02i"
+#define FMT_DateTime_text_subsec FMT_DateTime_text".%09i"
 /* 
 USAGE:
     DateTime dt;
@@ -63,7 +68,7 @@ USAGE:
     printf(FMT_DateTime_text, DT_expand(dt));
 */
 #define DT_expand(dt) dt.d.year, dt.d.month, dt.d.month_day, dt.t.hour, dt.t.min, dt.t.sec
-
+#define DT_expand_subsec(dt) dt.d.year, dt.d.month, dt.d.month_day, dt.t.hour, dt.t.min, dt.t.sec, dt.t.nsec
 
 #if __cplusplus
 }
diff --git a/src/time.c b/src/time.c
index 13d8e7e..0659ac7 100644
--- a/src/time.c
+++ b/src/time.c
@@ -71,3 +71,17 @@ void DateTime_get(DateTime* dt, bool utc_time){
     dt->d.week_day = c_tm.tm_wday + 1;
     dt->d.year_day = c_tm.tm_yday + 1;
 }
+
+Result(void) DateTime_parse(cstr src, DateTime* dt){
+    zeroStruct(dt);
+    f64 sec_f = 0;
+    i32 r = sscanf(src, "%"SCNi16".%"SCNi8".%"SCNi8"-%"SCNi8":%"SCNi8":%lf", 
+        &dt->d.year, &dt->d.month, &dt->d.month_day, 
+        &dt->t.hour, &dt->t.min, &sec_f);
+    if(r != 6){
+        return RESULT_ERROR_FMT("attepmted to parse DateTime, got %i fields out of 6", r);
+    }
+    dt->t.sec = (i32)sec_f;
+    dt->t.nsec = (sec_f - (i32)sec_f) * 1e9;
+    return RESULT_VOID;
+}