https://c-s.net.ua/forum/topic85482.html

#include <amxmodx>
#include <dhudmessage>
#include <reapi>

#define PLUGIN "Night VIPs"
#define VERSION "Private"
#define AUTHOR "Racoon"

new pcvar_night_start_hour
new pcvar_night_end_hour

new hour, minute, second
new bool:is_night_vip[33]

public plugin_init()
{
   register_plugin(PLUGIN, VERSION, AUTHOR);
   pcvar_night_start_hour = register_cvar("night_start_hour", "0");
   pcvar_night_end_hour = register_cvar("night_end_hour", "9");
   RegisterHookChain(GamedllFunc_CBasePlayer:RG_CBasePlayer_Spawn, "fw_PlayerSpawn_Post", 1)
}

public client_disconnect(id)
{
   is_night_vip [id]= false
}

public client_putinserver(id)
{
   time(hour, minute, second)
   if (hour >= get_pcvar_num(pcvar_night_start_hour) && 
      hour < get_pcvar_num(pcvar_night_end_hour) && (!(get_user_flags(id) & ADMIN_ALL)))
      { 
         new flags = read_flags("t") //тут ставим свой флаг по усмотрению
         // new name[32]
         // get_user_name(id, name, 31)
         set_user_flags(id,flags)
         set_task(20.0, "msg_hud_night_vip", id + 100)
         is_night_vip [id]= true
      }
}

public msg_hud_night_vip(taskid)
{
   new id = taskid - 100
   if(!is_night_vip[id]) return;
   set_dhudmessage(0, 255, 0, -1.0, 0.60, 2, 6.0, 5.0, 0.05, 1.5);
   show_dhudmessage(id, "Вы получили Nочную VIPky");
}

public fw_PlayerSpawn_Post(id)
{
   if(!is_night_vip[id]) return;
   
   set_task(1.0, "msg_menu_vip", id + 200)
}

public msg_menu_vip(taskid)
{
   new id = taskid - 200
   if(!is_night_vip[id]) return;
   set_hudmessage(0, 255, 0, 0.99, 0.88, 0, 6.0, 20.0, 0.05, 1.5);
   show_hudmessage(id, "Вам доступна VIP Оружейка");
}