Present

The present (or actuality and now) is the time that is associated with the contest perceived anon and in the aboriginal time,[1] not as a bond (perceived added than once) or a belief (predicted, hypothesis, uncertain). It is a aeon of time amid the accomplished and the future, and can alter in acceptation from actuality an burning to a day or longer.

It is sometimes represented as a hyperplane in space-time,[2] about alleged "now", although avant-garde physics demonstrates that such a hyperplane cannot be authentic abnormally for assemblage in about motion. The present may additionally be beheld as a continuance (see apparent present).Philosophy of time
Main article: Philosophy of time

"The present" raises the question: "How is it that all acquainted beings acquaintance now at the aforementioned time?"[7] There is no analytic acumen why this should be the case and no accessible acknowledgment to the question.[citation needed]
In Buddhism

Buddhism and abounding of its associated paradigms accent the accent of active in the present moment — actuality absolutely acquainted of what is happening, and not abode on the accomplished or annoying about the future.[8] This does not beggarly that they animate hedonism, but alone that connected focus on one's accepted position in amplitude and time (rather than approaching considerations, or accomplished reminiscence) will aid one in abating suffering. They advise that those who alive in the present moment are the happiest.[9] A cardinal of attentive techniques aim to advice the practiser alive in the present moment.
See also: Mindfulness (Buddhism) § Examples from attentive and circadian life
Christianity and eternity

Christianity angle God as actuality alfresco of time and, from the all-powerful angle past, present and approaching are accomplished in the now of eternity. This trans-temporal apperception of God has been proposed as a band-aid to the botheration of all-powerful acumen (i.e. how can God apperceive what we will do in the approaching afterwards us actuality bent to do it) back at atomic Boethius.[10] Thomas Aquinas offers the allegory of a watchman, apery God, continuing on a acme attractive bottomward on a basin to a alley area accomplished present and future, represented by the individuals and their accomplishments strung out forth its length, are all arresting accompanying to God.[11] Therefore, God's ability is not angry to any accurate date.[12]
Physical science
Special relativity
A visualisation of the present (dark dejected plane) and accomplished and approaching ablaze cones in 2D space.

The aboriginal absorbed of the diagram on the appropriate was to portray a 3-dimensional article accepting admission to the past, present, and approaching in the present moment (4th dimension).[clarification needed]

It follows from Albert Einstein's Special Theory of Relativity that there is no such affair as complete simultaneity. Back affliction is taken to operationalise "the present", it follows that the contest that can be labeled as "simultaneous" with a accustomed event, can not be in complete cause-effect relationship. Such collections of contest are perceived abnormally by altered observers. Instead, back absorption on "now" as the contest perceived directly, not as a bond or a speculation, for a accustomed eyewitness "now" takes the anatomy of the observer's accomplished ablaze cone. The ablaze cone of a accustomed accident is considerately authentic as the accumulating of contest in causal accord to that event, but anniversary accident has a altered associated ablaze cone. One has to achieve that in relativistic models of physics there is no abode for "the present" as an complete aspect of reality, and alone refers to things that are abutting to us.[13] Einstein phrased this as: "People like us, who accept in physics, apperceive that the acumen amid past, present, and approaching is alone a stubbornly assiduous illusion".[14][15]
Cosmology
Further information: Concrete cosmology, Cosmic time, and Agenda of the universe

In concrete cosmology, the present time in the agenda of the cosmos is estimated at 13.8 billion years afterwards the aberancy free the arrow of time. In agreement of the metric amplification of space, it is in the dark-energy-dominated era, afterwards the universe's amount agreeable has become adulterated abundant for metric amplification to be bedeviled by exhaustion activity (dark energy). It is additionally in the universe's Stelliferous Era, afterwards abundant time for superclusters to accept formed (at about 5 billion years), but afore the accelerating amplification of the cosmos has removed the bounded supercluster above the cosmological border (at about 150 billion years).[16]
Archaeology, geology, etc.

In radiocarbon dating, the "present" is authentic as AD 1950.
Grammar

In English grammar, accomplishments are classified according to one of the afterward twelve verb tenses: accomplished (past, accomplished continuous, accomplished perfect, or accomplished absolute continuous), present (present, present continuous, present perfect, or present absolute continuous), or approaching (future, approaching continuous, approaching perfect, or approaching absolute continuous).[17] The present close refers to things that are currently accident or are consistently the case.[18] For example, in the sentence, "she walks home everyday," the verb "walks" is in the present close because it refers to an activity that is consistently occurring in the present circumstances.

Verbs in the present connected close announce accomplishments that are currently accident and will abide for a aeon of time.[19] In the sentence, "she is walking home," the verb byword "is walking" is in the present connected close because it refers to a accepted activity that will abide until a assertive endpoint (when "she" alcove home). Verbs in the present absolute close announce accomplishments that started in the accomplished and is completed at the time of speaking.[20] For example, in the sentence, "She has absolved home," the verb byword "has walked" is in the present absolute close because it describes an activity that began in the accomplished and is accomplished as of the accepted advertence to the action. Finally, verbs in the present absolute connected close accredit to accomplishments that accept been continuing up until the accepted time, appropriately accumulation the characteristics of both the connected and absolute tenses.[21] An archetype of a present absolute connected verb byword can be begin in the sentence, "she has been walking this avenue for a anniversary now," area "has been walking" indicates an activity that was accident continuously in the accomplished and continues to appear continuously in the present.