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- DATE User Commands DATE
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- NNAAMMEE
- date - print and set the date
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- SSYYNNOOPPSSIISS
- ddaattee [-nu] [-d dst] [-t minutes_west] [yymmddhhmm [..ss] ]
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- DDEESSCCRRIIPPTTIIOONN
- If no arguments are given, the current date and time are
- printed. Providing an argument will set the desired date;
- only the superuser can set the date. The -_d and -_t flags set
- the kernel's values for daylight savings time and minutes
- west of GMT. If _d_s_t is non-zero, future calls to _g_e_t_t_i_m_e_o_f_-
- _d_a_y(2) will return a non-zero _t_z__d_s_t_t_i_m_e. _M_i_n_u_t_e_s__w_e_s_t pro-
- vides the number of minutes returned by future calls to _g_e_t_-
- _t_i_m_e_o_f_d_a_y(2) in _t_z__m_i_n_u_t_e_s_w_e_s_t. The -_u flag is used to
- display or set the date in GMT (universal) time. _y_y
- represents the last two digits of the year; the first _m_m is
- the month number; _d_d is the day number; _h_h is the hour
- number (24 hour system); the second _m_m is the minute number;
- .._s_s is optional and represents the seconds. For example:
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- date 8506131627
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- sets the date to June 13 1985, 4:27 PM. The year, month and
- day may be omitted; the default values will be the current
- ones. The system operates in GMT. _D_a_t_e takes care of the
- conversion to and from local standard and daylight-saving
- time.
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- If _t_i_m_e_d(_8) is running to synchronize the clocks of machines
- in a local area network, _d_a_t_e sets the time globally on all
- those machines unless the --nn option is given.
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- FFIILLEESS
- /usr/adm/wtmp to record time-setting. In /usr/adm/messages,
- _d_a_t_e records the name of the user setting the time.
-
- SSEEEE AALLSSOO
- gettimeofday(2), utmp(5), timed(8),
- _T_S_P: _T_h_e _T_i_m_e _S_y_n_c_h_r_o_n_i_z_a_t_i_o_n _P_r_o_t_o_c_o_l _f_o_r _U_N_I_X _4._3_B_S_D, R.
- Gusella and S. Zatti
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- DDIIAAGGNNOOSSTTIICCSS
- Exit status is 0 on success, 1 on complete failure to set
- the date, and 2 on successfully setting the local date but
- failing globally.
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- Occasionally, when _t_i_m_e_d synchronizes the time on many
- hosts, the setting of a new time value may require more than
- a few seconds. On these occasions, _d_a_t_e prints: `Network
- time being set'. The message `Communication error with
- timed' occurs when the communication between _d_a_t_e and _t_i_m_e_d
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- Sprite v1.0 April 1, 1987 1
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- DATE User Commands DATE
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- fails.
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- BBUUGGSS
- The system attempts to keep the date in a format closely
- compatible with VMS. VMS, however, uses local time (rather
- than GMT) and does not understand daylight-saving time.
- Thus, if you use both UNIX and VMS, VMS will be running on
- GMT.
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- Sprite v1.0 April 1, 1987 2
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