
Christmas riding an annoyed goat. By Robert Seymour (1798 – 1836) [Public domain], via Wikimedia Commons
Annoyance is relatively poorly researched in psychology compared to emotions such as happiness, anger or disgust with Piers Morgan. As is often the case in psychology, there isn’t even a clear consensus as to what annoyance actually is. Therefore, which theory regarding the cause of annoyance we use will depend on how we define annoyance itself. Some have chosen to define annoyance as a type of stress, some as a mild form of anger, and some as a distinct cognitive process or emotion in its own right, which nonetheless is very similar to slight anger. This is ironically irritating.
Briefly, a common definition of stress is when resources (physical or psychological) are exceeded by the demands on those resources. Lazarus, and Launier stated that psychological stress is the consequence of an individual’s inability to cope effectively with environmental demands. For example, experiments from 1971 demonstrated that people who knew that they could eventually stop a stressful noise or knew when a stressful noise would stop experienced fewer stressful effects than people who didn’t have this knowledge. If you were forced to watch The X Factor and didn’t know when the Cowelly cacophony would end, then a stress response would result. In terms of early Christmas, stress and annoyance could be related to uncertainty as to when holiday demands (shopping, social obligations to family and friends, pressure to enjoy Home Alone) will start and finish, and whether those demands can be met. While the stress of Christmas is undoubtedly a real phenomenon and we could see how a prolonged state of Christmas could increase this stress, intuitively this emotional response seems difference to annoyance.
Anger in general has been more widely studied than annoyance and has been described across most cultures and multiple species. The recalibration theory of anger argues that the function (in evolutionary terms) of anger is to promote the resolution or recalibration of undesirable situations in favour of the individual experiencing anger. Anger occurs when something is wrong and needs to be changed. You are between me and some food/ a potential mate/not having my opinion unchallenged on social media and anger mobilises psychological and physical resources for me to try to correct that. Whether that thing can be changed or not is another story entirely. Early Christmas may be viewed by some as an out-of-place environmental stimulus, resulting in anger and a desire to change or avoid this misplaced jolliness. Someone shouts ‘bah’ at you, and you respond with a ‘humbug’.

A load of Christmas balls. By Calle Eklund/V-wolf (Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)%5D, via Wikimedia Commons
Moreover, behaviours that could potentially cause annoyance have been categorised into four groups of ‘social allergens’ based on how intentional they are and how specifically they are aimed at the person experiencing annoyance. These don’t necessarily explain why behaviours are annoying, but do allow some more precise description of annoying situations. The four groups of social allergens include:
- Uncouth actions/impolite personal habits (unintentional and undirected) – the person on the bus picking their nose and sticking the nasal treasure to the window
- Inconsiderate activities (unintentional and directed) – the person who was supposed to meet you on the bus, but is late
- Rule breaking (intentional and undirected) – the person smoking on the bus
- Intrusive behaviours (intentional and directed) – Katie Hopkins telling you her opinions on the bus

Look, glitter! Buy stuff! By Iamraincrystal (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)%5D, via Wikimedia Commons
In summary, it would seem that psychologically, early Christmas can be classified as an intrusive behaviour and as an example of rule breaking. People experience this as an unpleasant collection of environmental stimuli that they weren’t predicting to occur yet and don’t know how long will last. Annoyance is then experienced as a mild form of anger to mobilise physiological and psychological resources for the avoidance of these stimuli.
The cingulate cortex is a part of the limbic system which has generally been associated with the formation and processing of emotions, learning and memories. MRI studies suggest that the cingulate cortex is involved with annoyance, noting a positive correlation between blood flow to this area of the brain and the level of irritation. Other brain areas implicated in the feeling of annoyance are the hippocampus (consolidating memories of annoyance with early Christmas from short- to long-term) and the amygdala (forming and retaining emotional memories of how annoying early Christmas is). However, the list of emotions and functions these brain areas have been associated with isn’t getting any shorter (I checked it twice), so any understanding of a neurological basis for annoyance with early Christmas is basically non-existent. While it can be helpful to know that theories can be applied to a wider range of relevant phenomenon, there’s no evidence for any of this with regards to why early Christmas is annoying and research probably isn’t forthcoming. This means this entire article is basically a Just So story (or Just Ho Ho Ho story if you prefer). How annoying.