# Date

**URL:** <https://www.ruby-forum.com/t/date/64704>\
**Category:** Development\
**Created:** [August 15, 2006, 2:17pm UTC](https://www.ruby-forum.com/t/date/64704 "2006-08-15T14:17:56Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Tadayoshi\_F](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/2bfe46/32.png) [@Tadayoshi\_F](https://www.ruby-forum.com/u/Tadayoshi_F)\
**Post date:** [August 15, 2006, 2:17pm UTC](https://www.ruby-forum.com/t/date/64704/1 "2006-08-15T14:17:56Z")

</div>

date e$B$K0J2\<$N$h$&$JJQ99$r$7$^$9!"$?$V$s!#e(B

- parse

e$BG/F|IUe(B (e$BNce(B: 2006-333, 2006333 06333) e$B$dNq=5F|IUe(B  
(e$BNce(B: 2006-W15-5,  
2006W155 06W155) e$B$GF|IU$,:n$l$^$9!#e(B

‘GMT Standard Time’ e$B$N$h$&$J%?%$%`%\>!\<%sL\>$r=&$$$^$9!#e(B  
‘Mexico Standard Time 2’ e$B$N$h$&$J$b$N$O%@%a$G$9!#e(B

‘GMT+09’e$B!"e(B’-3’e$B!"e(B’-3.5’ e$B$N$h$&$J;~:9$b=&$$$^$9e(B  
(e$B$=$l$\>$le(B +09:00e$B!"e(B-03:00e$B!"e(B  
-03:30 e$B$HEy2Ae(B)e$B!#e(B+091234 e$B$de(B +09:12:34  
e$B$b\<u$1$H$j$^$9!#e(B

# e$B$3$l$^$G!"e(B’GMT+09’

e$B$N$h$&$J;~:9$r=&$o$J$+$C$?$N$O!“2r\<a$,$U$?$D$”$je(B

# e$B$($k$+$i$G$9!#e(BPOSIX

e$B$O@\>$,@5$G$9$,!"$7$+$7!"$3$NI=8=$O\>o\<1E\*$G$O$J$$e(B

# e$B$H;W$&$N$G!"$3$l$r@Z$j\<N$F$k$3$H$K$7$^$7$?!#e(B

‘1 pm’ e$B$N$h$&$JJ,$N$J$$;~9o$b=&$$$^$9!#e(B

e$BF|$N$J$$G/7n$N$\_$N7A\<0$O4pK\E\*$K$"$D$+$o$J$$J}?K$G$7$?$,!“e(B’Sept  
2000’  
e$B$h$&$J$b$N$J$I!”$$$/$D$+$O\<u$1$D$1$k$D$b$j$G$9!#e(B

‘09’ e$B$,e(B 9e$BF|e(B e$B$HG’\<1$5$l$^$9!#e(B

‘10.9.2000’  
e$B$N$h$&$J%I%C%H$G6h@Z$C$?F|IU$b=&$&$+$b$7$l$^$;$s!#$"$D$+$$e(B  
e$B$Oe(B / e$B$HF1$8!#e(B

e$BF|K\8l$NF|IU$,DL$k$3$H$,$"$j$^$9!#e(B

parse e$B$O0J2\<$N$h$&$JF|IU$b\<u$1$H$l$k$h$&$K$J$j$^$9!#e(B

‘jan 2 3 am +4 5’  
‘fri1feb3bc4pm+5’  
‘e$BJ?@.85G/e(B8e$B7ne(B8e$BF|e(B (e$B2Pe(B)  
e$B8a8ee(B2e$B;~e(B30e$BJ,e(B59.5e$BICe(B’

- str[fp]time

str[fp]time e$B$K;XDj;Re(B %Le$B!"e(B%Ne$B!"e(B%Q e$B$rDI2C$7$^$9!#e(B

strptime e$B$G!"e(B%se$B!"e(B%Qe$B!"G/F|IUe(B: %Y-%je$B!"Nq=5e(B:  
%G-%V-%u e$B$J$I$r$D$+$C$FF|IUe(B  
e$B$,$D$/$l$^$9!#e(B%Y-%[UW]-%[uw] e$B$NAH$\_9g$;$G$b$D$/$l$^$9!#e(B

parse e$B$HF1MM$K!"e(B’GMT Standard Time’e$B!"e(B’-3’e$B!"e(B’-3.5’  
e$B$N$h$&$J%?%$%`%\>!\<%s!"e(B  
e$B;~:9$r\<u$1$D$1$^$9!#e(B

strptime e$B$Oe(B strftime e$B$N7A\<0$r$h$jB:=E$7$^$9!#$?$H$($P!“e(B%j  
e$B$O?t;z$re(B3e$B7ee(B  
e$B0J\>eFI$`$3$H$O$”$j$^$;$s!#e(B%Y  
e$B$O4pK\E\*$K9b!9e(B4e$B7e$V$s$7$+FI$\_$^$;$s$,!"$De(B  
e$B$.$K4|BT$5$l$k%Q%?!\<%s$,?tCM$G$J$$$HH=CG$G$-$l$P!"@)8B$5$l$^$;$s!#0J2\<e(B  
e$B$N$h$&$J\>l9g$O@.8y$7$^$9!#e(B

\_strptime(‘20060808’, ‘%Y%m%d’)  
\_strptime(‘92006-08-08’, ‘%Y-%m-%d’)  
\_strptime(‘friaug’, ‘%a%b’)

strftime e$B$G!"e(BGNU e$B$N$b$N$HF1MM$N%U%i%0e(B [-\_0^#]  
e$B$HI};XDj$r$D$+$($k$h$&$Ke(B  
e$B$9$k$+$b$7$l$^$;$s!#e(Bstrptime  
e$B$KAjEv$N;E3]$rMQ0U$9$k$D$b$j$O$^$C$?$/$"e(B  
e$B$j$^$;$s!#e(B

strptime e$B$O0J2\<$N$h$&$JF|IU$b\<u$1$H$l$k$h$&$K$J$j$^$9!#e(B

strptime(‘fri1feb034pm+5’,’%a%d%b%y%H%p%Z’)

- e$B%a%=%C%I$NDI2Ce(B

{prev,next}\_{year,day} e$B$r2C$($h$&$+$H;W$$$^$9!#e(Bnext\_day  
e$B$O!"0z?t$,$J$$e(B  
e$B\>l9g$O!“0JA0$+$i$”$ke(B next e$B$HF1$8$G$9!#e(B

1.9 e$B$G!"$$$D$N$^$K$+e(B min e$B$Ke(B minute  
e$B$r$$$&JLL\>$,$D$1$i$l$F$$$?$N$G$9$,!“e(B  
Date e$B$G$Oe(B min e$B$O$D$+$($J$$$N$K!“e(Bminute  
e$B$H$7$F;2\>H$G$-$k!”$H$$$&$\*$+$7e(B  
e$B$J$3$H$K$J$C$F$$$?$N$G!”:o=|$7$F$$$^$7$?!#$b$7!“e(Bminute e$B$de(B  
second e$B$,$”$Ce(B  
e$B$?$[$&$,$$$$!"$H$$$&$3$H$G$"$l$P!"$"$i$?$a$FMQ0U$7$^$9!#e(B

e$B$"$^$j$D$+$o$l$F$$$J$$$H;W$$$^$9$,!“e(Bos?e$B!“e(Bns?  
e$B$O!”$d$O$j$”$^$j$h$/$J$$e(B  
e$BL\>A0$J$N$G$O$J$$$+!"$H$$$&$3$H$G!"Be$j$Ke(B julian?e$B!"e(Bgregorian?  
e$B$rMQ0U$7e(B  
e$B$h$&$H;W$$$^$9!#\>-MhE\*$K!"e(Bos?e$B!"e(Bns? e$B$OGQ;\_$NJ}8~$G!#e(B

e$B$"$^$j$D$+$o$l$F$$$J$$5!G=$@$H;W$$$^$9$,!"?7Nq$N3+;OF|$N;XDj$G!"??56CMe(B  
e$B$r$D$+$o$J$$$h$&$7$F$$$-$?$$$H;W$$$^$9!#:#8e$O!"e(BDate::JULIANe$B!"e(B  
Date::GREGORIAN e$B$r$D$+$&$h$&4+$a$^$9!#e(B

- 1.8 e$B$He(B 1.9 e$B$N0c$$e(B

parse  
e$B$GF|K\8l$NF|IU$rDL$9!"$H$$$&$N$O!":G=_E_$K$O\>C$92DG=@-$,9b$$$H;We(B  
e$B$$$^$9$,!"J86g$,$J$1$l$P!"e(B1.9 e$B$KF~$l$k$D$b$j$G$9!#e(B1.8  
e$B$K$OF~$l$^$;$s!#e(B  
e$B$^$C$?$/$N?75,$N%a%=%C%I$O!“e(B1.8 e$BF~$l$k$D$b$j$O$”$j$^$;$s!#e(B

e$B$A$J$_$K!":#8=:_$Ne(B 1.8 e$B$He(B 1.9 e$B$N0c$$$O!"e(B

{Time,Date,DateTime}#to\_{time,date,datetime} e$B$NDI2C!#e(B  
{next,prev}\_month e$B$NDI2C!#e(B  
sunday? e$B$J$I=R8l$NDI2C!#e(B  
e$B$$$D$N$^$K$+e(B parsedate.rb e$B$Ke(B strptime e$B$,$"$k!#e(B  
– e$B$3$3$Ke(B strptime e$B$OI,MWe(B?  
– e$B%(%i!\<%a%C%;!\<%8$,$\*$+$7$$!#e(B