Time and weather based effects

The passage of time can be observed in game with the command /time. One in-game hour lasts 18 real life minutes. Daytime is from 6am to 8pm. Night is from 8pm to 6am.

There are a few special holy days that will grant special bonuses to those who are online. Additionally there is always a bonus in place from the season, time of day, and weather.

Weather effects

Zone-based, weather effects the potency of certain spells, depending on the their base-type. Certain spells can also change the weather of a zone.

Weather	Effect
Snow	Cold spells are 2.5% stronger and fire spells are 2.5% weaker.
Rain	Magic spells are 2.5% stronger and fire spells are 2.5% weaker.
Dry	Fire spells are 1% stronger.

Time of Day effects

Time of day determines whether certain shops or other NPCs are available. In cities, this is particularly of note, since many houses and shops are locked at night (and being inside of one of these buildings when it locks may result in a less-than-friendly reaction from city guards.)

Name	In Game Time	Effect
Day time	6am to 8pm	Heals are 10% stronger.
Night time	8pm to 6am	Lifetaps and undead creatures (including necromancer/shadow knight pets) are 10% stronger.

Seasonal effects

The seasons of Dalaya play a role in extending the duration and increasing the power of spells, depending on the their base-type.

Name	In Game Date	Effect
Spring	March to May	during this season poison-based spells are 5% more potent and longer lasting.
Summer	June to August	during this season fire-based spells are 5% more potent and longer lasting.
Autumn	September to November	during this season disease-based spells 5% more potent and longer lasting.
Winter	December to February	during this season cold-based spells are 5% more potent and longer lasting.

Holy Days

Recurring annually, Holy Days are announced in-game when they begin, and a reminder is given at log-in.

Name	In Game Date	Effect
The Feast of the Creation	January 15th	On this day, by long-standing tradition, worshipers across Dalaya come together to celebrate the Creation of Dalaya and its Pantheon by the hands of the Elemental One, eons upon eons in the past. All worshipers are rewarded for their admiration with a 5% bonus to damage and healing. Worshipers of The Divine Light--the entire Pantheon--receive twice this bonus.
Enthann's Challenge	February 9th	On this day long ago, Enthann challenged Tarhyl for the Throne of the Flame Spirits--and lost, leaving Tarhyl's ranks forever. In commemoration of his effort, all forms of damage are increased in power by 15%.
Shiritri's Dawn	March 1st	As Spring overtakes the dying Winter, Shiritri's power fills the world with renewed whimsy. On this day, charming and mesmerizing spells are 25% less likely to be resisted, and last 10% longer.
Malath's Sacrifice	April 3rd	Taldorians across Dalaya take this day to fast and reflect in a symbolic communion with their Creator, the mysterious archmage Malath, and to remember his death, along with the destruction of their former home in the Lands of Magic. As a result of this communion, an overwhelming will to survive is awakened in all Taldorians, allowing them to overcome those who threaten them by increasing their ability to perform all kinds of critical feats (melee, spell, and healing) by 10%.
Tarhansar's Jubilee	April 28th	As the Spring rains begin to come in earnest, swelling the rivers and lakes of Dalaya, Tarhansar and all the creatures of the sea celebrate. On this day alone, Tarhansar extends his powers throughout all Dalaya, allowing unrestricted movements even under the dense waters of the oceans, so that his children may dance. All creatures will receive a 30% bonus to attack speed while underwater.
Sivyana's Torment	May 19th	As Shiritri's power begins to wane, Sivyana exerts her dominance over Dalaya, preparing all its creatures for the coming of the season of Tarhyl with her brutality. On this day, pain in all its forms is more intense and menacing, from the sting of the slightest wound to the shock of the most virulent affliction. All damage over time spells will do their damage 25% faster, and Poison spells are increased in power by 10%, in addition to the 5% bonus of the season.
Tarhyl's Reign	June 1st	As the heat of Summer drives out the Spring rains, Tarhyl asserts his power, dominating those of the others among the Four. Fire spells are increased in power by 20%, in addition to the 5% bonus of the season.
Althuna's Vigil	July 12th (day only)	As the heat of Summer reaches its zenith, Althuna prays on behalf of all Dalayans for reprieve from the pain and destruction of Tarhyl's flames. Healing spells are increased in power by 50%, in addition to the 10% bonus of daylight.
Jayla's Enlightenment	August 7th	On this day, all those who search for knowledge celebrate the awakening and accension of a mere spirit of the earth under Sihala into a deity in her own right--the Goddess of Lore herself, Jayla. To aid in the eternal quest to which Jayla, her lorekeepers, and thoughtful Dalayans of all shapes devote themselves, meditation rates are increased by 50%.
Sihala's Harvest	September 1st	As Autumn calms the sputtering ashes of Summer, Sihala returns the balance of the Four to its rightful order. Owing to the harmonious unity of this balance,buff spells are able to last 50% longer, and resurrections are mana-free.
Gradalsh's Defilement	October 20th	As all the world falls into the decay of Autumn, Gradalsh seizes his chance to spread his vile influence, corrupting the balance created by Sihala and throwing Dalaya into chaos. As a result of this influence, maladies of every kind are able to outlive themselves. Damage over time spells will last 25% longer, and Disease spells are increased in power by 10%, in addition to the 5% bonus of the season.
The Day of Strife	November 9th	Though Gradalsh's influence wanes as the champions of Althuna repel his minions and cure his plagues, yet the chaos of his corruption remains. On this day, the power of the gods, one and all, reaches its nadir. As an emptiness sweeps through the hearts of all worshipers, and creatures around the world are weakened as their creators turn their power toward bickering in their demiplanes as they try to restore their spheres of influence over Dalaya to an acceptable balance, all those who have forsaken the gods feel emboldened, and able to triumph where before they have failed. The power of all Pariahs increases on this day, giving them a 20% bonus to damage and healing.
Shojar's Advantage	December 1st	As Winter blankets the decayed remnants of Autumn, Shojar takes advantage of the weakening of the balance of the pantheon, consolidating his power and fortifying his defenses against the legions of Tarhyl. Cold spells are increased in power by 20%, in addition to the 5% bonus of the season.
Marlow's Night	December 24th (night only)	As the Winter nights wrap Dalaya in shadow longer and longer, the shivering nightmares of good Dalayans empowers Marlow, allowing her influence to spill over into the waking world. On this night, all undead NPCs are doubled in power and Lifetaps are 50% stronger, in addition to the 10% bonus of night.

See also

• Weather, Seasons and Holy Days! thread from the Tome of Knowledge